460 BOTANY. 



6. C. TENUIS, Gray. 2° high, very finely puberulent and nearly glabrous, efifusely pauicled, with 

 slender hranohlets, subfiliform leaves and scattered flowers. See page 233. 



» * * Sepals e-nerved, the upper one einarginate-bifid ; corolla rather deeply bilibiate, the lower 

 lip half shorter than the galea ; stamens 4, the lower anther-cell either abortive or wholly want- 

 ing ; filaments slightly villous ; leaves all short, linear, usually entire. 



7. C. LAXIFLOEUS, Gray. Panioulately branched, very hirsute; flowers solitary or approximate. 

 See page 232. 



i 2. HEMISTEGIA. Flowers without bractlets, in a simple or sometimes branched spike, each ses- 

 sile in the axil of a clasping bract ; calyx of a single 2-toothed leaflet, the lower leaflet wanting. 

 Not glandular, somewhat viscid, a span to a foot high. 



■• Filaments glabrous ; base only of the anther-cells ciliolate or bearded, 

 (a.) Lower leaves and the bracts all entire ; stamens 4, the longer with 2-celled anthers, the shorter 



with a small lower cell only ; seeds short-beaked, testa smooth (?). 

 C. MAEiTiMUS, Nutt. Subpubcscent, leaves linear or linear-lanceolate, glabrate, mostly obtuse, 

 spreading ; spike short, simple ; filaments very unequal.^Coast of California. 



C. CANESCENS, Gray. Pubescent, erect; leaves lauoe-linear, acute, suberect; bracts lanceolate; 

 flowers few, purplish. See page 233. 



(b.) Cauline leaves entire, the bracts broader and often incised; stamens 2; seeds obtuse, the testa 



pitted-reticulate. 

 C. MOLLIS, Gray. Loosely subhirsute-villous ; stem and branches diffuse; leaves linear, short; 

 bracts oblong, 2-3-toothed or entire, a little shorter than the yellowish corolla ; spikes sometimes 

 branched.— Mare Island, Bay of San Francisco, (Wright.) 



* * Filaments villous ; stamens 4, with 2-colled anthers, the cells bearded both at base and apex ; 



leaves 3-cleft ; bracts 3-5-cleft. 

 C. KiNGli, S. Watson. Erect, branched, viscid and villous-pubescent ; leaf-segments linear; corolla 

 purplish, villous. See page 233, and Plate XXII. 



NAMA. 



From Dr. Geay's revisions of the genus, Proc. Amer. Acad., Vol. V, p. 337, and Vol. VIII, p. 283. 

 51. Leaves decurrent and winging the stem, obovate. or spatulate; villous with a soft pubescence 

 or pilose ; branches prociimbent. 



1. N. Jamaioensis, L. Peduncles very short ; seeds costate-pitted. — Key West ; Texas ; Mexico. 



2. N. BiFLOEA, Chois. Peduncles filiform; seeds alveolate. — E. Mexico. 



§ 2. Cauline leaves all or mostly sessile and subamplexicaul^ not decurrent ; pubescence soft hut not 

 hoary ; annual. 



3. N. TJNDTJLATA, HBK. Erect ; leaves often undulate, all alternate, linear- or spatulate- oblong, the 

 lower oblanoeolate-spatulate with the base attenuate ; peduncles mostly very short ; the mature capsule 

 nearly 1" long, about equaling the palyx ; seeds alveolate-reticulated. — Texas and New Mexico to Chili. 



4. N. Beelandieki, Gray. Leaves oval-oblong ; capsule a half shorter than the calyx ; seeds indis- 

 tinctly pitted. — E. Mexico. 



§ 3. Leaves all attenuate at base or petioled- 



* Annual, rough with stiff or somewhat rigid hairs, not hoary ; leaves attenuate to a rather slouder 



base but scarcely petioled ; sepals narrowly and exactly linear. 



5. N. HISPIDA, Gray. Flowers often in pairs ; capsule oblong ; seeds 24-40 in each cell, |-J" long, 

 oblong, very obscurely ridged. — From W. Texas and New Mexico to S. California. 



6. N. DEMISSA, Gray. Capsule short-oblong; seeds 10-12 in each cell, J-J" long, oval, less obscurely 

 rugose-pitted. See page 259. 



* * Annual; pubescence softer or shorter and a little cinereous ; sepals more or less dilated upward. 



7. N. Sakdwicensis, Gray. Sandwich Islands. 



8. N. COULTERI, Gray. Pubescence rather roughish ; leaves oblong-spatulate, the lowest only atten- 

 uate into a petiole; corolla twice longer than the calyx, 5" long ; capsule oblong ; seeds broad oval, J' 

 long or less, smoothish. — S. California or Arizona ; Chihuahua. 



