VI. PLANT.E WRIGHTIAX.E. 31 



P. (Mo>!NiNOPsis) IIEMIPTEROCARPA (sp. nov.) : glabra, porrniiis ; canlibus gracili- 

 bus ramisque strictis striato-angulatis foliosis ; foliis subulato-liiiearibus uninerviis 

 alternis; racemo virgato multifloro ; flovibus albis luox ])endulis; carina cristata 

 alis obovatis paullo breviore ; capsula oblonga membranacea, loculo postico duplici- 

 ter alato inter laminas dehiscente, antico paullo minore indeliiscente semen fere 

 ecarunculatum includente. — Stony bills of tbe Sonoita, near Deserted Rancbo, on 

 the borders of Sonora. (937.) — Root perpendicular, perennial. Stems erect, 

 sparingly branched above (the branches strict), slender, strongly striate-angled, 12 

 to 20 inches high. Leaves mostly erect, rather rigid, somewhat crowded, alternate, 

 sessile ; acute, seldom half a line wide ; the lower cauline about 3 lines long ; the 

 upper and those of the branches 7 to 10 lines long. Raceme rather densely flow- 

 ered, 2 or 3 inches in length. Bracts subulate-lanceolate, about the lengtli of the 

 short pedicels, very caducous. Calyx white or whitish ; the three small sepals 

 ovate, rather obtuse ; the wings obovate, slightly unguiculate, rather longer than 

 the corolla, one third sliorter than the capsule. Lateral petals obovate, as long as 

 the entire and hooded keel, not including its crest ; which is nearly as in P. scoparia. 

 Stamens 8, in two sets. Stigma cucullate and bilabiate ; the short upper lip trun- 

 cate and tipped with a small tuft of bearded hairs ; the lower lip decurvcd, also 

 somevi'hat truncate and ciliolate. Ovary equal-sided, two-celled, with a single ovule 

 in each cell. Capsule thin and membranaceous, glabrous, oblong, obscurely emargi- 

 nate, 2v lines in length, somewhat gibbous ; the cell next the axis behig rather 

 larger than the other, and appendaged v/ith a crenulate, bilamellar wing, reaching 

 from near its base to the apex, dehiscent between the two lamince ; the valves 

 then becoming outspread, so that they form, as it were, a broad, obcordate Aving, 

 surrounding the anterior cell (the one next the carina), which is indehiscent, con- 

 formed to the seed, and not at all winged or margined on its back. Seed cylin- 

 drical, hirsute with spreading hairs ; that of the posterior cell with a conspicuous 

 caruncle, the linear lobes of which are fully half the length of the seed ,• that of 

 the indehiscent and anterior cell with the caruncle obsolete or rudimentary. — In 

 general aspect, this species is intermediate between P. alba and P. scoparia ; but 

 taller than either. From the singular structure of the fruit, it must constitute a 

 marked new section of the genus. 



MoxMNA WRiGHTn (sp. nov.): annua, fere glabra; caule gracili; foliis lanceo- 

 latis linearibusve subsessilibus ; floribus parvis mox detlexis hexandris ; fructu sicco 

 complanato iufequaliter ovato acutissime marginato uniloculari, faciebus uninerviis 

 venulosis. — Crevices of rocks, mountain-sides, near the copper mines. New Mexico ; 

 Aug., in flower; Oct., in fruit. (938.) — The flowering specimens are about a 

 span, the slender fruitful ones a foot or more, in height. Leaves one or two inches 

 long, 2 to 4 lines wide ; the very lowest small and obovate ; the others acute. 

 Raceme one or two inches long ; sometimes there are other and very short racemes 

 in the axils. Bracts minute. Flowers a line and a half long, greenish-white tinged 

 with purple. Stamens 3 in each phalanx : filaments glabrous. Fruit deflexed, flat- 

 tened, scarcely 2 lines long, with a sharp and wing-like margin, and the sides cari- 

 nately one-nerved, minutely puberulent under a lens. Seed smooth, not carunculate. 



