name which I do not propose to revive, since the stems when well developed are a foot high. It is distinguished from B. paucidentata by its solitary heads, and its campanulate involucre with broader and very obtuse scales. B. coridifolia has clustered and much smaller heads, and scabrous-ciliate leaves.-B. juncea, Desf., to which belongs B. subulata, Don, often has the stems leafy, and so lignescent at the base that the root would seem to be perennial.

Senecionidea.

TITHONIA PUSILLA (sp. nov.): annua, hispidula; foliis oppositis subalternisve lanceolatis fere integerrimis breviter petiolatis; capitulis nudis pedunculatis; involucri squamis lanceolatis hirsutis subpaucis; acheniis villosis; pappi paleis 4-6 aristisque binis plumoso-ciliatis.— Obrajillo, Peru.

VIGUIERA PERUVIANA (sp. nov.): foliis alternis ellipticis seu ovatooblongis acutatis vel mucronatis acute serratis trinervatis utrinque cinereis supra hispidulo-scabris subtus appresso-hirsutulis basi acutis subsessilibus; involucri squamis oblongo-lanceolatis apice patentibus extus præsertim ad margines albo-hirsutis; receptaculo obtuse conico; ligulis elongatis; pappo 4-squamellato biaristato. - Andes of Peru, between Obrajillo and Culluay.

COREOPSIS (AGARISTA) PICKERINGII (sp. nov.): suffruticosa, fere glaberrima; ramis apice longe nudis monocephalis ; foliis oppositis petiolatis triternatisectis, segmentis lineari-subulatis rhachi tenui vix latioribus; involucri squamis exterioribus linearibus interioribus oblongis dimidio brevioribus; paleis receptaculi oblongis obtusissimis, exterioribus dorso villosis; acheniis lineari-oblongis dorso sub palea glabris adventrem et præsertim margines villosissimis biaristatis; aristis villosobarbellatis corolla paullo achenio dimidio brevioribus. - High Andes of Peru above Obrajillo. - This is one of a group of species of the Andes which unite De Candolle's Californian genus Agarista to Coreopsis. Of these C. fasciculata, Wedd. is in the present collection, and is no. 571 of Matthews's collection in the same district, wherefore I had named it C. Matthewsii in the Hookerian herbarium. It has both faces of the achenia glabrous, but the margins ciliate with long villi. C. venusta, H. B. K., or an apparent variety of it with nearly filiform leaves and smaller heads on short peduncles, was gathered by Matthews in the province of Chachapoyas. C. capillacea, H. B. K., was collected by Seemann at Loxa. And the two succeeding species (of which the latter

most nearly approaches De Candolle's genus Agarista) are described from specimens in the Hookerian herbarium.

COREOPSIS (AGARISTA) FOLIOSA (sp. nov.): ramis hirtellis usque ad apicem confertissime foliosis; foliis (subpollicaribus) oppositis glaberrimis rigidis crassiusculis tripartitis, segmentis lateralibus anguste spathulato-oblongis, terminali tripartito; capitulis paucis subcorymbosis breviter pedunculatis; involucri externi squamis 8 lineari-oblongis obtusissimis pubescentibus quam interiores ovales brevioribus; ligulis (flavis) oblongis; corollis disci luteis demum brunneis; acheniis oblongis hirsutis utrinque unicarinatis margine hirsutissimis biaristatis; aristis subsquamelliformibus triquetris dense ciliato-hirsutis corollam adæquantibus. Andes of Peru, Matthews, No. 1376.

COREOPSIS (AGARISTA) SPECTABILIS (sp. nov.): suffruticosa? glabra; foliis oppositis circumscriptione rotundis bipinnatisectis vel 3-5-sectis, segmentis 5-partitis, lobis linearibus acutis integerrimis bi- trifidisve laxis; ramis in pedunculum longissimum (6-10-poll.) nudum monocephalum desinentibus; involucris ambobus 8-phyllis glaberrimis basi connatis, squamis exterioris linearibus quam interiores ovato-oblongæ colorato-marginatæ dimidio brevioribus; ligulis 8 magnis; disco luteo brunnescente; acheniis lineari-oblongis extus sub palea glabris marginibus et costa ventrali longissime villosis aristas 2 paleoliformes villoso-ciliatas corollam subæquantes gerentibus. Folia sesquipoll. diametro, capitulum disco semipoll. et ultra diam.; ligula pollicaria, flavæ. Andes of Peru, McLean.

COREOPSIS MAUIENSIS (sp. nov.): fruticosa, diffusa, parce hirtella, mox glabrata; foliis trisectis, segmentis oblongis vel subcuneatis incisodentatis (nunc 3-5-partitis seu terminali pinnatipartito); pedunculis elongatis monocephalis ; involucri exterioris phyllis linearibus (apice nunc glandula instructis) interiores æquantibus; acheniis glabris anguste oblongis modice alatis haud contortis apice bidentatis, dentibus triangulari-subulatis. — Maui, Sandwich Islands, on sandy or dry hills near the coast; a form with more dissected leaves also collected by Remy.

Coreopsis and Bidens are separated by a single, artificial, and not wholly constant character. The group of species on which Nuttall grounded his genus Diodonta wholly accords with the Platycarpaa section of Bidens, except that the awns or teeth are antrorsely hispid or naked. Recently we have received, from Mr. Fritchey of Missouri, specimens of C. aristosa, Michx., or perhaps of a wild cross between

that species and some Bidens, with retrorsely hispid awns. The Sandwich Islands offer a series of species which equally connect the Psilocarpaa section of Bidens with Coreopsis. Some of these, having their achenia remarkably curved or twisted at maturity, were naturally distinguished as a separate genus, Campylotheca. But its adoption merely gives us three limitless genera unmarked by any peculiarity of habit in the place of two artificially separated ones. The foregoing species is in all respects a good Coreopsis. The first of the following ones differs merely in its elongated achenium, slightly disposed to curve or twist. The others are Campylothecæ, with more or less curved or spirally twisted achenia, either narrowly wing-margined or wingless, but manifest congeners of the rest. Their union with Coreopsis is suggested both by their wanting the technical character of Bidens, and by the fact that the former already contains species with winged and with curved achenia. On the other hand only a slight and arbitrary line is to be drawn between Bidens Sandwicensis, Less., and Campylotheca micrantha. Yet when the (always straight) achenia of the former bears awns, these are retrorsely hispid, although sparingly so. Vain is the attempt to draw absolute limits where Nature luxuriates in gradations; but, on the whole, the old distinction between Bidens and Coreopsis appears to be practically the best one.

COREOPSIS (CAMPYLOTHECA) MACROCARPA (sp. nov.): herbacea ? glabra; foliis pinnatim 5-sectis, segmentis ovatis cuspidato-acuminatis argutissime creberrime serrulatis; pedunculis oligocephalis folia subsuperantibus; acheniis pro capitulo magnis (subpollicaribus) linearibus striatis alatis vix tortis subapice biaristulatis seu bicorniculatis. - Sandwich Islands, on the mountains of Oahu.

COREOPSIS (CAMPYLOTHECA) MACREI (Campylotheca grandiflora, DC. Prodr.): herbacea, puberulo-hirtella; ramis elongatis patentibus; foliis ternatim sectis, segmentis lanceolatis acuminatis creberrime serratis; capitulis laxe paniculatis haud magnis; acheniis linearibus glaberrimis calloso-marginatis calvis "aut junioribus vix bisetosis" spiraliter tortis. Hawaii, Sandwich Islands, Macrae, Remy. The above character is drawn up (with De Candolle's in view) from no. 287 of Remy's collection, supplied by the Paris Museum. The species does not merit the name grandiflora (preoccupied in Coreopsis), although the heads are nearly twice the size of those of C. micrantha.

COREOPSIS (CAMPYLOTHECA) COSMOIDES (sp. nov.) herbacea, fere glabra; foliis caulinis pinnatim 5-sectis summisve trisectis, ramealibus

sæpe indivisis segmentisque ovato-oblongis acuminatis argute serratis membranaceis; pedunculis breviusculis monocephalis; capitulo magno (pollicem longo); involucro exteriori 8-phyllo interius adæquante, phyllis oblongis seu oblongo-lanceolatis; ligulis (subpollicaribus) apice inciso lobatis; genitalibus præsertim stylo longissimo valde exsertis ; acheniis (immaturis) linearibus exalatis nunc flexuoso-curvatis margine hispidulis apice setuloso-coronulatis aristis 2 brevibus seu brevissimis fere nudis subterminatis. Hawaii, Sandwich Islands: also in coll. Remy, no. 278.

COREOPSIS (CAMPYLOTHECA) MENZIESII (sp. nov. Campylotheca australis, Less. pro parte?): suffruticosa, fere glaberrima, corymbosoramosa; foliis bipinnati-(vel subternati-) sectis, summis 3-5-partitis, segmentis longe anguste linearibus integerrimis; capitulis parvis (2 lin. longis) plurimis in corymbum digestis breviter pedunculatis; involucro exteriori breviore; acheniis angustissime linearibus elongatis glaberrimis apice calvis rariusve obsolete 1-2-setulosis, exterioribus sæpe tenuiter subalatis, maturis leviter flexuosis vel tortis. Variat inflorescentia foliisque (segmentis interdum laciniatis) pl. m. pubescentibus. Ligulæ 3 lin. longæ. - Hawaii and Maui, Sandwich Islands. Also collected by Menzies, Chamisso? and Remy.

COREOPSIS (CAMPYLOTHECA) MICRANTHA (Bidens micrantha, Gaud. Campylotheca micrantha, Cass. C. australis, Less. excl. syn. Forst. & Spreng.): basi suffruticosa, glabra, paniculato-ramosa; foliis pinnatim 3-7-sectis partitisve, summis nunc indivisis, segmentis lanceolatis seu oblongo-lanceolatis grosse argute serratis nunc incisis nunc 3-5-fidis venosis; capitulis parvis (2 lin. longis) plurimis corymbosis; involucris subæquilongis; acheniis elongatis angustissime linearibus glabris exalatis apice nudo aut truncato aut sæpius mucrones vel aristulas 1- 2 breves læves gerentibus, maturis brunneis arcte spiraliter contortis. Sandwich Islands, especially Oahu. Variable in the foliage, which is commonly more dissected than in Gaudichaud's figure. Chamisso seems to have had specimens of C. Menziesii intermixed with various forms of the present species. The achenium, described by Lessing as "anguste alatum" would appear to belong to the former species.

BIDENS SANDWICENSIS (Less.): herbacea, glabra; foliis membranaceis plerisque trisectis, segmentis ovatis seu ovato-lanceolatis acuminatis argute serratis, lateralibus petiolulatis vel sessilibus; capitulis laxe corymboso-paniculatis parvis radiatis; involucri phyllis linearibus gla

bris eciliatis; acheniis anguste linearibus glabris vel marginibus parce hispidulis apice setulosis aut exaristatis aut aristulis 1-2 (nunc nudis nunc parce retrorsum hispidulis) superatis. To this belongs B. micrantha, Hook. & Arn., but not of Gaudichaud; B. peduncularis, DC., but not of Gaudichaud; B. mutica and B. gracilis of Nuttall. In more than one collection it has been confounded with Campylotheca micrantha. Moreover, the awnless state is doubtless the Adenolepis pulchella of Lessing; a gland-like thickening at the tip of the involucral scales being often obvious in this, and also in some allied species (especially in Coreopsis Mauiensis), but it is inconstant. To this species may also be referred B. paniculata, Hook. & Arn., from Tahiti (as a simple-leaved state, with the awns more developed and more barbed than usual), and probably B. angustifolia, Nutt. (with dissected leaves); likewise the following varieties:

:

Var. HETEROPHYLLA (B. luxurians, Hook. & Arn.): caule basi suffruticosa? foliis longe petiolatis plerisque simplicibus oblongo-lanceolatis acumine longo integerrimo caudatis basi attenuatis, paucis trisectis, segmentis sublinearibus; acheniis sæpius biaristulatis.

Var. OVATIFOLIA caule herbaceo; foliis simplicibus ovatis subcordatis longissime petiolatis; ovariis coronula setularum superatis exaristatis.

BIDENS HAWAIENSIS (sp. nov.): herbacea, glaberrima; caule elato ramoso polycephalo; capitulis corymboso-paniculatis; foliis omnibus simplicibus longe petiolatis oblongis vel ovatis acutis vel acuminatis crebre serratis crassiusculis; involucri glaberrimi phyllis linearibus obtusis eciliatis; ligulis 7-8 elongatis; acheniis anguste linearibus glabris apice nudo breviter biaristatis, aristis erectis retrorsum barbatis. Hawaii, Sandwich Islands, at various stations. Disk of the capitulum when in flower 3 or 4, in fruit fully 6, lines long; ligules yellow, 5-9 lines long.

BIDENS LANTANOIDES (sp. nov.): fruticosa, ramosa, hirsutulo-pubescens; foliis omnibus simplicibus ovalibus oblongisve creberrime serratis petiolatis; pedunculis solitariis monocephalis folia subæquantibus; involucri exterioris phyllis lineari-oblongis discum adæquantibus; ligulis brevibus; acheniis lineari-subtetragonis marginibus apiceque hispidulis breviter vel brevissime biaristatis. — Eimeo, Society Islands. Head 4 lines in diameter.

Var.? GLABRATA: magis herbacea; foliis utrinque attenuatis; capitulis subpaniculatis. Tahiti.