256 HYDROPHYLLAOIi-JE. (WATERLEAF FAMILY.) 



3. P. glandulosa, Nutt. Viscid-pubescent and glandular, softly if at 

 all hirsute, a span to a foot or more high : leaves irregularly and interrupted! <i 

 twice pinnatifid, or below divided; the numerous lobes small, somewhat incised, 

 obtuse : corolla bluish, purplish, or white, with lobes shorter than the tube : 

 stamens and style moderately or conspicuously exserted. — Gravelly soil, 

 Colorado to Arizona and Texas. 



Var. Neo-Mexieana, Gray. Lobes of the corolla either slightly or 

 conspicuously erose-denticulate. — P. Neo-Mexicana, Thurber. 

 +- -i- Calyx more or less setose-hispid. 



4. P. Popei, Torr. & Gray. Viscid-pubescent and hispid with spread- 

 ing hairs, a span to a foot high : leaves bipinnately parted or pinnatifid ; the 

 divisions pinnatifid, with 5 to 9 short, obtuse lobes : calyx-lobes a little longer 

 than the globose capsule: corolla white, campanulate, its lobes entire: sta- 

 mens at length much exserted. — Pacjf. It. Rep. ii. 172. Colorado and south- 

 ward. Included under P. glandulosa, Nutt., in Synopt. Fl. ii. 160, but restored 

 in Proc. Am. Acad. xix. 87. 



§ 2. Ovules and seeds several (6 to 12) or more numerous on each placenta: 

 appendages of the mostly campanulate corolla in the form of 10 vertical salient 

 lamellce. — Eutoca. 



5. P. sericea, Gray. A span to a foot high from a branching caudex, 

 silky-pubescent or canescent, or the simple virgate stems and inflorescence 

 villous-hirsute, rather leafy to the top : leaves pinnate!;/ parted into linear or 

 narrow-oblong numerous and often again few-cleft or pinnatifid divisions, silky- 

 canescent or sometimes greenish ; the lower petioled ; the uppermost simpler 

 and nearly sessile : short spikes crowded in a naked spike-like thyrsus : corolla 

 violet-blue or whitish: stamens long exserted: capsule a little longer than the 

 calyx. — Mountains of Colorado, Nevada, and northward. 



6. P. Menziesii, Torr. A span to a foot high, at length paniculate- 

 branched, hispid or roughish-hirsute : leaves mostly sessile, linear or lanceolate 

 and entire, or some of them deeply cleft ; the lobes few or single, linear or 

 lanceolate, entire : spikes or spike-like racemes thyrsoid-paniculate, at length 

 elongated and erect : corolla bright violet or sometimes white : stamens about 

 the length of the corolla : capsule shorter than the calyx. — Watson, Bot. King 

 Exp. 252. Montana to Utah and westward. 



4. NAUA, L. 



Low herbs : the corolla purple, bluish, or white. In ours the corolla is 

 short-fnunelform and hardly exceeding the calyx, the flowers are in the forks 

 of the stem, and the leaves are entire. 



1. N. dichotomum, Ruiz & Pav., var. angUStifolium, Gray. 

 Erect, a span high, minutely pubescent, glandular : stem repeatedly forked 

 and with a nearly sessile flower in each fork : leaves narrow, linear or nearly 

 so : sepals narrowly linear : seeds marked with about 5 longitudinal rows of 

 large pits, from 4 to 6 in each row. — Proc. Am. Acad. viii. 284. Colorado 

 and New Mexico. 



