Spadice pedunculato, pedunculo cylindrico, involucro herbaceo caducissimo; Floris densè spiraliter dispositi sepalis, junioribus sub-imbricatis, cœruliis basi oblique cuneati apice subcordato ovatis. Stam. 6, filamentis crassis bractæis sub-longioribus antheræ cerulæ sub-quadrata biloculari, lateraliter dehiscentes, polline gibbi ellipsoidoeo lutieo. Ovaria erecta-lævia 3-6 spermis, semina 2-4 (2-3 abortientibus,) erectis ovatis, 8 costatis. Testa exterior herbacea viridi laxâ 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 sejunctis. 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 transversalibus. Limbo plerumque petiolo longiore vernatione involuti. Floriis numerosi in spadicè elongato dispositis; primo confertis, rachides elongatâ 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. filamentis erectis divaricatis carnosis persistentibus. Anthera biloba lateraliter dehiscente decidua e flavo cœrulescente. 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 lævi, simplex; vel membrum exterior tenuissima vix discreta. Raphe et chalazâ non cernabibilibus.

Embryo erectus macropodus. Cotyledone maximo concavo carnoso plumulam amplutente. Plumula (in semine etiam) maxima bifolia, fo

liis inæqualibus margine involutis.

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

Note.-Roxburgh describes the flowers as in monastachy, but there is considerable difference between my two species, perhaps 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.

b. 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.

f. Flower after inflorescence and capsules nearly ripe, with persis

tent bracts and stamens.

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

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

i and i. 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.

7. 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 raphé and chalaza, in various veins.

r. Embryo, all the coats taken off.

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

verse.

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

u. Embryo section.

v. Seed, longitudinal section.

w. Germinating seed.

r. Longitudinal section of ditto.

a. Ditto further advanced.

y. I. Plumula, extracted from a-II. Plumula in seed before germi

nation.

2. y. More magnified.

Bt. Progressive states of germinating seed.

Part of leaf magnified.