174 7^ ^ y JIYDROPHp^LACEip. Nama. 



' ^ # Leaves decurrent on tae stem. 



N. Jamaicense, L. Diffusely spreading or prostrate, soft-pubescent : leaves membrana- 

 ceous (an inch or two long), broadly obovate or spatulate, tapering into a petiole-like base 

 which is continued into wing-like margins of the stem : flowers mostly solitary, terminal 

 and soon extra-axillary, short-pedicelled : corolla white, hardly longer than the narrow 

 linear sepals: capsule narrow oblong. — Lara. 111. t. 184; P. Browne, Jam. t- 18. —Low 

 grounds, Texas, Florida. (W. Ind., Mexico.) 



# * Leaves not decurrent. 

 -)— Cauline leaves all sessile, the upper by a more or less clasping base: villous-pubescent and 

 somewhat viscid : seeds very numerous. 



•N. undulatum, HBK. Erect, diffusely branched, at length procumbent, leafy : branches 

 a span to a foot long : leaves oblong ; the upper with a broad sessile base, the lower spatu- 

 late : flowers commonly subsessile : corolla fnnnelform, somewhat longer than the linear- 

 spatulate sepals : capsule oblong, more or less shorter than the sepals : seeds oval, with a 

 smooth and thin diaphanous coat, which is obscurely striate lengthwise and minutely 

 pitted under a strong lens. — HBK. Nov. Gen. & Spec. ii. 130. (Mexico.) 



Var. macranthum, Chois. (Hydrol. 18, t. 2, fig. 1) ; a looser and less leafy form, 



with flowers (solitary or 2 and 3 together) on pedicels which vary from 1 to 5 lines long: 

 corolla (4 or 5 lines long) almost twice the length, and capsule only about half the length 

 of the spatulate-tipped sepals. — Gray, Proc. Am. Acad. x. 330. N. Berlandieri, Gray, Proc. 

 Am. Acad. viii. 282. — Texas, along the Rio Grande near its mouth, and on the Mexican 

 side of the river. 



N. stenocarpum, Gray. Like the preceding, or sometimes with narrower leaves : 

 pedicels, if any, short and rigid in fruit: capsule cylindrical, nearly linear (3 lines long), 

 nearly equalling the narrow linear sepals : seeds short, angled by mutual pressure, with a 

 tliickish and opaque strongly reticulated and somewhat alveolate coat (only a quarter of 

 a line long). — Proc. Am. Acad. x. 331. N. undulatum, Gray, 1. c. viii. 282, not HBK. — 

 Texas near the mouth of the Rio Grande, Berlandier. Along the northern borders of 

 Mexico to the province of Sonora on the borders of Arizona, Palmer. 



H— ^— Leaves not at all clasping, more or less tapering at base, at least the lower petioled. 



++ Corolla narrow-funnelform, mostly much longer than the calyx : seeds oval, with a thin and 

 diaphanous close coat: flowers subsessile or short-peduncled. 



" N. hispidum, Gray. A span to a foot high, repeatedly forked, hispid or hirsute : 

 leaves broadly or narrowly linear-spatulate, most of the cauline ones sessile : flowers 

 lateral and solitary, or 3 to 5 in terminal unilateral nearly bractless clusters : sepals nar- 

 rowly linear, very little if at all broadened upwards : capsule narrowly oblong, 30^0- 

 seeded: seeds smooth, very obscurely rugulose when highly magnified. — Proc. Am. Acad, 

 v. 33!), & Bot. Calif, i. 517. N. Jamaicensis, Engelm. & Gray, PI. Lindh., not Linn. JS\ 

 dichotoina & N. hiflora, var. spathulata, partly, Torr. Bot. Mex. Bound 147, &c. — Plains and 

 prairies, Texas to Arizona, and south-eastern borders of California. The extreme western 

 form, with softer pubescence, sometimes has 3 or 4 styles and placentse. 



»N. demissum, Gray. Dwarf, diffuse or depressed, 2 or 3 inches high, hirsute-pubescent, 

 sometimes hispid: leaves linear-spatulate, all or most of them tapering into a petiole: 

 flowers subsessile in the forks: sepals very narrowly linear, not at all broader upwards : 

 capsule short-oblong, 10-16-seeded : seeds much larger than in the preceding (oval or 

 obloiuj, a quarter to a third of a line long). — Proc. Am. Acad. viii. 283 (mainly) ; "Watson, 

 Bot. King. 259, 460 ; Gray, Bot. Calif, i. 517. — Interior desert region, Washington Terr, to 

 Nevada, and Utah (form with corolla, only 3 lines long) ; also S. Utah, Arizona, and the 

 soutli-eastern borders of California ; the latter forms with ampler purple or crimson corolla, 

 4, 5, or nearly 6 lines long. Filaments very unequally inserted, their adna'te bases with 

 somewhat free margins. 

 N. Coulteri, Gray. Diffusely branched from the base, ascending, a span high, hirsute- 

 pubescent, somewhat viscid : leaves oblong-spatulate, the lower tapering into a petiole ; 

 flowers mostly in the forks and short-pedicelled : sepals with spatulate-dilatcd tips, not 

 half the length of the narrow fnnnelform corolla: capsule narrowly oblong, 50-60-seeded : 

 seeds short-oval, obscurely rugulose-pitted. — Proc. Am. Acad. viii. 283, & Bot. Calif. 517. 

 — " C^alifornia," Coulter. But probably from Arizona or the adjacent part of Mexico. 

 Corolla 5 lines long. 



