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Spadice pedunculato, pedunculo cylindrico, involucro herbaceo caducissimo; Floris dense spiraliter dispositi sepalis, junioribus sub-imbricatis, curaliia basi oblique cuneati apice subcordato ovatis. Stam. 6, filamentis crassis bractaeis sub-longioribus antherae cerulae sub-quadrata bilocnkri, lateraliter dehiscentes, polline gibbi ellipsoidoeo lutieo. Ovaria erecta-laevia 3-6 spermis, semina 2-4 (2-3 abortientibus.) erectis ovatis, 8 costatis. Testa exterior herbacea viridi laxa facile separabili. Interior ad embryonem arete adpressa brunnea leviter striata, uno latera raphe irridi, chalaza magna viridi.* Cotyledon germinans elongatur in cornu, plumata diutius basi lateraliter fisso evolvitur, folio elliptico, cotyledon solidum, album, plumule basilare minimum.

Sp. undulatum. Foliis brevi petiolatis lineari oblongis, basi cuneatis, submersis ulvaceis. Floribus in spadice post anthesin elongato sejunctB. Sepalis caducissimis.

Rhizoma tuberosa, radicibus crassis paucis filamentosis ad apicem.

Foliis plurimis radicalibus petiolatis, lanceolatis, undulatis a limbo in petiolium decurrente nervo medio crasso, lateralibus, 2-4 paralleles nervis transverealibus. Limbo plerumque petiolo longiore vernatione involuti.

Floriis numerosi in spadice elongato dispositis ; primo confertis, rachides elongata sparsis pedunculo longissimo emersi. Spatha acuta ante anthesin decidua. Sepalis 2, sub-spathulatis basi quasi unguiculatis coloratis (lacteo-albis) caducissimis, ad stamina 2 lateralia oppositis.

Stamine 6. fUamentis erectis divaricatis carnosis persistentibus. Anthem biloba lateraliter dehiscente decidua e flavo coerulescente. Polline luteo acute elliptico (in iodino vel acido globosa.)

Pistille 3, ovario superiore libero, stigmat terminal. Fructus 2, carpillis 3 follicularibus basi subinerveis demum divaricatis sistuis.

Follicula disperma, seminibus erectis umbilico brun. Testa Isevi, simplex; vel membrum exterior tenuissima vix discreta. Raphe et chalaza non cernabibilibus.

Embryo erectus macropodus. Cotyledone maximo concavo carnoso plumulam amplutente. Plumula (in semine etiam) maxima bifolia, foliis inaequalibus margine involutis.

* Roxburgh describes the rachis as wood. I have not seen this appearance in any ipwimen I have met with.

Sote.—Roxburgh describes the flowers as in monastachy, but there is considerable sifference between my two species, peihaps this may not be his Undulatum, but otherwise it fully answers his description.

References to the Plates of Spathium Monostachys. a. A single flower, seen sideways. 6. Ditto from below or front, shewing the two bracts in situ.

c. Stamen.

d. A bract.

e. Imaginary section, shewing situation of parts of flower.

/. Flower after inflorescence and capsules nearly ripe, with persistent bracts and stamens.

g and g. Another more magnified, and resting on the side.

k. Section of ditto, shewing its two cells placed back to back.

i and ». I. Pollen, gibbous at one side, much magnified—in II elliptic; j. globose under the influence of iodine.

k. Pistil, with small oblique terminal stigma.

I. Ditto, section shewing ovaries in situ.

m. m. Capsules.

n. Section of ditto.

o. Seed.

p. Ditto magnified, shewing the ribs of the outer-coat.

q. Ditto, outer-coat taken off, shewing the raphe1 and chalaza, in various veins.

r. Embryo, all the coats taken off.

s. Second coat taken off, striated, dark brown, chalaza grown transverse.

t. Section of seed, shewing the eight ribs of outer-coat.

a. Embryo section.

v. Seed, longitudinal section.

10. Germinating seed.

x. Longitudinal section of ditto.

a. Ditto further advanced.

y. I. Plumula, extracted from a—II. Plumula in seed before germination. z. y. More magnified.

/3 t j. Progressive states of germinating seed. t Part of leaf magnified.

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