EriLOBIACEiE. 213 



tapering : seeds oblong, turgid, olitiisely angled. — Interior of the State, 

 from Sacramento, Dr. Pybxirn, southward; flowers said to be fragrant. 



7. (E. trichocalyx, Nutt.; T. & G. Fl. i. '494 (1840). Erect, often 

 simple, white-stemmed, 6 — 18 in. high, from a biennial root : leaves all 

 pinnatifid : calyx almost woolly, the tips of the lobes not free in the 

 bud : petals obcordate : capsule thickened at base : seeds ovate-oblong, 

 somewhat compressed. — Eastern base of the Sierra. 



-)—•)—-•— Nearly or quite acaulescent; fl. vesperline, Ike buds erect; capsule 



ovate, ribbed or wing- angled: seeds in 2 tows in the cells. — 



Genera Pachylophus and Lavauxia, Spach. 



8. (E. csespitosa, Nutt.; Eras. Cat. (1813); Sims, Bot. Mag. t. 1.593 

 (1814) ; Nutt. Gen. i. 246 (1818) : CE. scapigera, Pursh, Fl. i. 263 (1814). 

 Pachylophus Nuttallii, Spach, Phaner. iv. 365 (1835). Stem very short 

 and stout, 2 — 6 in. high, from a biennial root : leaves oblanceolate, 

 acute, petiolate, irregularly sinuate-toothed or nearly entire, glabrous or 

 somewhat villous : calyx-tube four times the length of the segments, 

 the tips of these not free in the bud : petals broadly obcordate, 1 — 1% 

 in. long, white, turning to rose-color : capsules sessile, ovate-oblong, 

 attenuate above, 1 — 1% i^- long, the margin of the valves tuberculate- 

 crested : sesds oval-oblong, with a narrow groove along the ventral side, 

 minutely tuberculate on the back. — Very common in the Rocky Mountain 

 region, doubtless reaching our eastern borders. 



9. (E. triloba, Nutt.; Bart. Fl. N. Am. ii. 37. t. 49 (1823) ; Sims, Bot. 

 Mag. t. 2566 (1825) ; Journ. Philad. Acad. ii. 118 (1826?). Stem very 

 short or obsolete : root biennial : leaves runcinate-pinnatifid, petiolate, 

 nearly glabrous : calyx-tube very long and slender ; segments with tips 

 free in the bud : petals yellow, broadly obovate, 1 in. long, 3 — 5-nerved : 

 capsule sessile, oblong or obovate, ^ in. long, with broadly winged 

 angles, the sides at length ribbed and reticulate : seeds angled and 

 minutely tuberculate. — Truckee Valley and northward, east of the Sierra. 

 * * Acaulescent; fl. diurnal, yelloiv, erect in bud; calyx-tube flliform above 



the ovary; stamens alternately long and short; stigmas capitate; 



seeds in 2 rows in the cells of the capsules. 



4— Perennials ; calyx-tube persistent; capsules not winged. — 



Genus Tabaxia, Nutt. 



10. (E. Xuttallii, T. & G. Fl. i. 507 (1840). Canescently pubescent : 

 leaves petiolate, oblanceolate, acuminate, 2 —6 in. long, pinnatifid ; the 

 segments unequal, usually rounded or obtuse : calyx-tube 1 — ^% in. 

 long ; segments somewhat shorter : petals ^^ in. long : capsules narrow, 

 attenuate upwards, 6—10 lines long, obtusely quadrangular : seeds 

 oblong, terete, 1 line long, obscurely lineolate. — Eastern base of the 

 Sierra from near Carson City northward. 



