174 HYDROPHYLLACE.E. Nama. 



* Leaves decurrent on the stein. 



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. Lam. III. t. 184; P. Browne, Jam. t. 18. Low 

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



* * Leaves not decurrent. 



-1 Cauline leaves all sessile, the upper by a more or less clasping base : villous-pubescent and 

 somewhat viscid : seeds very numerous. 



N. imdulatum, 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 fuunelform, 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. iii. 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. Berlaridieri, 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 

 thickish 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 Kio Grande, Berlandier. Along the northern borders of 

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



-i -i Leaves not at all clasping, more or less tapering at base, at least the lower petioled. 



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

 diaphanous close coat: tlowers subsessile or short-peduucled. 



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, 30-40- 

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

 v. 339, & Bot. Calif, i. 517. N. Jamaicensis, Engelm. & Gray, PI. Lindh., not Linn. N. 

 dichotoma & N. bijlora, var. spatluduta, 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 placentae. 



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 

 oblong, 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 

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

 4, 5, or nearly G lines long. Filaments very unequally inserted, their adnate 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-dilated tips, not 

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

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

 "California," Coulter. But probably from Arizona or the adjacent part of Mexico. 

 Corolla 5 lines long. 



