pubescente. Caules vix spithamæi, simplices. Folia 4-6 lin. longi. Flores 3 lin. longi, albi luteo et purpureo tincti: corolla basi valde gibbosa: stamina 8.

3a. POLYGALA PUBERULA, Gray, Pl. Wright. 1, p. 40; floribus minoribus.

4. IONIDIUM FRUTICULOSUM (Benth. Bot. Voy. Sulph. p. 6, t. 2): var. DENTATUM: caulibus herbaceis 9-pollicaribus; foliis lanceolatis seu linearibus, majoribus argutissime dentatis. This must belong to Bentham's I. fruticulosum, a bad name; for in our plant the stems are wholly herbaceous, and I am not sure that the indurated and stout root is really perennial. The leaves vary from linear to broadly lanceolate, and the larger ones especially are beset with sharp salient teeth. The short peduncles, flowers, &c., accord with the published character and figure.

Gen. & Sp. 6, p. Spergularia rupesThe leaves are nar

5. DRYMARIA FRANKENIOIDES, H. B. K. Nov. 21, t. 515; Torr. in Mex. Bound. Surv. 2, p. 36. tris, Benth. Bot. Voy. Sulph. p. 17? non Camb. rower than in the figure above cited, and the small intermediate lobes of the petals are three instead of four; otherwise there is no obvious difference, and No. 698 of Coulter's Mexican collection (from Zimapan) is intermediate in appearance. Without examining the petals the plant might naturally be taken, as I suppose it was by Bentham, for a Spergularia.

6. DRYMARIA CRASSIFOLIA, Benth. Bot. Voy. Sulph. p. 16. D. polycarpioides, Gray, Pl. Fendl. p. 12.

7. TRIANTHEMA MONOGYNA, Linn.; Gray, Pl. Wright. 1. p. 15. 8. SIDA ELLIOTTI, Torr. & Gray, var.? Gray, Pl. Wright. 2, p. 21. Frutescens.

9. ABUTILON CALIFORNICUM, Benth. Bot. Voy. Sulph. p. 8; var. foliis sublobatis discoloribus.

10. SPHÆRALCEA INCANA, Torr. in Gray, Fl. Fendl. p. 23, & Bot. Mex. Bound. p. 39. One of the less canescent forms.

11. HIBISCUS (BOMBICELLA) RIBIFOLIUS (sp. nov.): fruticosus, humilis, fere glaber; stipulis setaceis persistentibus; foliis rotundatis subcordatis crenato-dentatis sæpe trilobis chartaceo-membranaceis venulis reticulatis; pedunculis axillaribus unifloris folio longioribus sub apice articulatis; involucello 8-9-phyllo, phyllis lineari-setaceis calycis lacinias ovato-lanceolatas subsuperantibus corolla (purpurea?) triplo brevioribus capsulam subglobosam æquantibus; seminibus in loculis

plurimis laxe crinitis. Caulis subpedalis. Folia semi- sesquipollicaria. Corolla sesquipollicaris. Most allied perhaps to H. phoeniceus; but the leaves are all rounded and obtuse, mostly lobed, and resembling those of a Ribes, the corolla much exceeding the calyx and involucel, &c. The young stems and petioles are slightly pubescent; the leaves perfectly glabrous.

12. GOSSYPIUM, foliis omnibus integris cordato-ovatis, Benth. 1. c.Like the specimens noticed by Bentham from the same district, destitute of fruit. The leaves of one specimen, however, begin to show lobes. It is probably a cultivated Cotton run wild.

13. MELOCHIA TOMENTOSA, Linn. "A common West Indian and Central American species, of which this is probably the northern limit."

14. KALLSTREMIA GRANDIFLORA, Torr. in Pl. Wright. 1, p. 28: var. DETONSA, Gray.

15. GALPHIMIA ANGUSTIFOLIA, Benth. Bot. Voy. Sulph. p. 9, t. 5. Apparently G. linifolia, Gray, Gen. Ill., is the same species, which extends across the continent on the southern border of the U. S.

16. KARWINSKIA HUMBOLDTIANA, Zucc.; Gray, Pl. Wright. 1, p. 32. ( Berland. coll. no. 820, 889, 689, 906, 2340, 2359, (= 1230, &c.)

=

17. MAYTENUS PHYLLANTHOIDES, Benth. Bot. Voy. Sulph. p. 54. This has also been found on the eastern side of the continent, on the lower part of the Rio Grande, and at Key West.

18. CARDIOSPERMUM MOLLE, H. B. K.? A single specimen without fruit.

19. CARDIOSPERMUM? sp. nov. A shrubby species, with the habit of Bentham's Cardiospermum tortuosum, from the same district, but wholly glabrous and with a different foliage; the fruit unknown, and therefore the genus uncertain.

20. DODONEA VISCOSA, Linn.? Destitute of flowers or fruit.

21. BURSERA MICROPHYLLA (sp. nov.): foliolis 14-16-jugis cum imparri 2-3 lin. longis oblongo-linearibus seu oblongis obtusis sessilibus in rhachi superne marginata; pedunculis 2-3-floris brevibus.— (In Sierras Tulè, Sonora, leg. A. Schott, ex herb. Torr.) Frutex rigidus. Folia ad apicem ramulorum brevissimorum conferta. Flores hermaphroditi, an polygami? Petala 5. Stamina 10. Discus 5-lobus. Ovula ex cl. Torrey in loculis solitaria suspensa. Cotyledones contortuplicatissima. Mr. Schott collected this with a few flowers and young fruit. Mr. Xantus, with fruit only, which is that of a Bursera.

22. DALEA CHRYSORHIZA (sp. nov.): pilosula; caulibus perplurimis e radice annua? filiformibus procumbenti-diffusis; foliolis 7-10jugis parvis (sesquilineam longis) obovato-linearibus emarginatis subtus nigro-glandulosis; stipulis minimis; pedunculis folia superantibus apice capitato-plurifloris; calycis pubescens dentibus oblongo-linearibus obtusis tubo fere æquilongis. — Radix perpendicularis, ut videtur annua, cortice aurantiaco. Caules pedales et ultra, tenues, parce pilosuli. Spica breves circiter 12-floræ; rhachi inter flores glandulis? singularibus fusiformibus acutis obsita. Calyx inter costas glandulosus, lobis cum bractea ovata calyce breviori foliaceis glandula acuta apiculatis. Corolla brevis, violacea. Legumen pilosulum. - A well-marked species of this large, prevailingly North Mexican genus.

23. PHASEOLUS FILIFORMIS, Benth. Bot. Voy. Sulph. p. 13. But the whole plant is puberulent. The root is certainly annual.

24. PHASEOLUS (MACROPTILIUM) atropurpureus, DC. Fl. Mex. Ic. ined., & Prodr. 2, p. 395; Torr. in Mex. Bound. Surv. 2, p. 50; var. SERICEUS. I do not possess any specimen of Dr. Torrey's P. atropurpureus, which, described as a new species, may well be identical with its homonyme of De Candolle. Our South California specimens are identical with those of Mr. Schott, from the Rio Grande, dubiously appended to this species by Dr. Torrey, only they are for the most part still more silky-downy. The plant is of the section Macroptilium, but has a short calyx. The wings are deeply colored. The root is perennial.

25. COURSETIA? GLANDULOSA (sp. nov.): foliis ramisque glabratis, petiolo in setam desinente, foliolis ellipticis mucronatis; racemis sæpe fasciculatis sessilibus brevibus plurifloris cum calyce viscoso-glandulosis.

- Rami tortuosi, nodosi, nascentes cinereo-villosi. Stipulæ setaceæ, persistentes. Foliola 7-9-juga, haud stipellata, petiolulata, 6-9 lin. longa, 3-4 lin. lata, parce appresso-puberula, mucrone conspicuo. Flores ex axillis foliorum annotinorum orti; racemi brevissimi sæpius bini vel terni; pedicelli conferti, 3 lin. longi. Bractæ parvæ, caducæ. Calyx ebracteolatus, breviter campanulatus, 5-fidus, pilis capitato-glandulosis viscosus; lobis triangulari-lanceolatis acutis, 2 superioribus paullo brevioribus et connatis. Corolla ut videtur pallide lutea; vexillum latissimum, emarginatum, basi biauriculatum, auriculis parvis; carina obtusa alis paullo breviori. Stamina diadelpha; antheræ conformes. Ovarium subsessile, lineare, glanduliferum, 10-12-ovulatum, continuum. Stylus gracilis a medio ad apicem subunilateraliter villosus: stigma capitatum. Legumen ignotum.

26. STYLOSANTHES VISCOSA, Sw. (S. glutinosa, H. B. K.): var.

ACUTIFOLIA.

27. CROTALARIA LUPULINA, DC.

28. CESALPINIA MEXICANA (sp. nov.): inermis, glabra; pinnis 3-4-jugis cum impari; foliolis 4-5-jugis; racemis plerumque simplicibus laxis; filamentis inferne villosis petala flava vix superantibus; ovario canescente; legumine glabrato acinaciformi 5-6-spermo. Var. a. foliolis venosis. In Nueva Leon et Chihuahua, Mexico, Berlandier, no. 941, 2371, Gregg, Eaton & Edwards. Var. B. CALIFORNICA: foliolis plerumque aveniis, coll. Rich. no. 4, & coll. Xantus. Foliola 6-9 lin., in var. Calif. 3-7 lin. longa, oblongo- vel subrotundoovalia. Alabastra 3 lin. longa. Sepala intus sericeo-puberula. Petala 4-5 lin. longa, glabra, suberosa. Legumina acinaciforma vel cultriformia, plana, sesqui- bipollicaria, in spec. Berland. magis oblonga rectiuscula. - This has long been extant in several collections, but we have only now, with the complete specimens of Xantus, fit materials for description.

29. MIMOSA XANTI (sp. nov.): Eumimosa, fruticosa, cinereo-pubescens; ramis aculeis infrastipularibus vel sparsis rarisve armatis : pinnis unijugis; foliolis 5-9-jugis oblongis supra velutino-puberulis subtus canescenti-pubescentibus et præsertim ad margines rhachique strigoso-setulosis; capitulis globosis; bracteolis hispidis corollam quadrifidam æquantibus; calyce parvo hyalino setoso-ciliato. - Legumen ignotum. Pinnæ petiolo duplo longiores. Foliola 3-4 lin. longa, inæquilatera, pennivenia, hinc nervo laterali percursa, setulis validioribus incumbentibus quasi marginata. Pedunculi solitari vel bini, monocephali, semipollicares. - Apparently a well-marked species of the Casta or Pectina subdivision, not described in Bentham's monograph.

30. LYSILOMA MICROPHYLLA, Benth. in Lond. Jour. Bot. 3, p. 83, & Pl. Hartw. p. 345. Legumen generis, 3-6 poll. longum, 5-8 lin. latum, stipite 2-3 lin. longo.- Berlandier's no. 3144, coll. distributed by Dr. Short, is a Lysiloma, in fruit, belonging to Mr. Bentham's second division; compared with Hartweg's no. 75, in flower only, it appears to be the same species. Therefore the character of L. desmostachys may be completed as follows:- Legumen lineari-oblongum, 6-7-pollicare, 1-2 poll. latum, substipitatum.

31. CALLIANDRA CALIFORNICA, Benth. Bot. Voy. Sulph. p. 14, t. 11. Only a fragment, depauperate, with the pinnæ reduced to a single pair. Stamens bright red.

In fruit only;

32. LEUCENA MACROPHYLLA, Benth. 1. c. p. 90? doubtful if Bentham's plant, which was collected at Acapulco, and in flower only. From the pod and the look of the foliage it may be an Albizzia.

33. ACACIA FLEXICAULIS, Benth. in Lond. Jour. Bot. 1, p. 505. In fruit.

34. ACACIA FARNESIANA, Willd. Also foliage of another species, perhaps A. Greggii.

35. ENOTHERA SINUATA, Linn., var. HUMIFUSA, Torr. & Gray. Except that the flowers are larger, the specimens accord with those from the counterpart peninsula of Florida.

36. MENTZELIA ASPERA, Linn.

37. TURNERA PUMILEA, L.

38. FOUQUIERIA SPINOSA, Gray, Pl. Wright. 1, p. 76. Bronnia spinosa, H. B. K. Nov. Gen. & Sp. 6, t. 528; Benth. Bot. Voy. Sulph. p. 16. This was collected at Rayon in Sonora by Professor Thurber, but is not enumerated in the Botany of the Mexican boundary.

39. ECHEVERIA FARINOSA, Lindl. in Jour. Hort. Soc. 4, p. 292, ex Walp. Ann. Bot. 2, p. 669. E. lanceolata, Nutt.? sed floribus longe pedicellatis. The broad-leaved Echeveria collected by Dr. Bigelow in Whipple's Exploration, and referred to E. lanceolata, Nutt., is evidently Lindley's E. laxa.

40. LORANTHUS. A species of the section Notanthera, Oscillanthera, indeterminable for want of foliage.

41. RANDIA ARMATA, DC.? In fruit only.

42. MITRACARPIUM LINEARE, Benth. Bot. Voy. Sulph. p. 20. The leaves vary from linear to lanceolate. Seeds as in M. breviflorum, which is probably a form of M. lineare with a smaller corolla.

43. HOUSTONIA (ANOTIS) ASPERULOIDES. Hedyotis asperuloides, Benth. Bot. Voy. Sulph. p. 19, t. 13. This nearly approaches some of the various forms of H. angustifolia; but the capsule is more clavateturbinate and the seeds are smooth, not pitted.

44. PECTIS MULTISETA, Benth. Bot. Voy. Sulph. p. 20.

45. PECTIS (PECTIDIUM) PUNCTATA, Jacq. A single fragment, perfectly resembling the West Indian plant.

46. HOFMEISTERIA FASCICULATA, Walp. Repert. 6, p. 106. Helogyne fasciculata, Benth. Bot. Voy. Sulph. p. 20, t. 14. The leaves are less dissected than in the specimens figured, often cordate-orbicular and obtusely or obscurely lobed, or only crenate, others three-cleft. H. ure