506 ONAGRACEiE. CEnothera. 



the flowers; but the species certainly belongs to this section, as Mr. Nuttall 

 remarks, notwithstanding the dehiscence; the placenta usually separating 

 into 4 pieces and remaining attached to the valves. The capsules are 

 in sessile clusters, 4-5 together in the axils of the leaves. 



§6. Stigma capitate : tube of the calyx infundibuliform, rather shorter than 

 the conspicuously pedicellate ovary : petals ohovafe, entire : sta?nens erect ; 

 the alternate filaments shorter: anthers ohlong, fixed bcloto the middle, 

 versatile : capsules cylindrical, somewhat membranaceous, A-nerved, on a 

 slender pedicel: seeds oblong-obovate, ascending, in a single series; the 

 testa membranaceous : stem annual : leaves usually all radical, ovate, 

 petioled, fleshy : scape tcith several {small, yellow, diurnal ?) flowers. — 

 Chylismia, Nutt. 



,' 44. CE. scapoidea (Nutt. ! mss., under Chylismia) : glabrous ; leaver 

 ovate or ovate-oblong, entire or obscurely denticulate, the limb about the 

 length of the petiole ; scape naked or rarely 1—2 -leaved, 3-8-flowered ; 

 bracts minute, many times shorter than the pedicels ; segments of the calyx 

 ovate-lanceolate, about the length of the tube and ihe broadly obovate entire 

 petals ; stvle and longer stamens nearly the length of the petals ; capsules 

 oblong, cylindrical, very obtuse, acute at the base, longer than the pedicels. 



Clay hills in the Rocky Mountains, Nuttall ! — Scape 2-4 inches high. 

 Leaves small. Corolla bright yellow, unchanged in fading, about 2 lines in 

 diameter. Capsule half an inch in length, 



§ 7. Stigma capitate : tube of the calyx filiform or subulate, elongated, in- 

 fundibuliform at the summit, marcescent : stamens erect ; the alternate 

 filaments shorter : anthers oval, fixed near the base : capstdes {radical} 

 conical-subulate, 4-sulcate, coriaceous, sessile : seeds somewhat ascending, 

 in a double series, oblong, terete, with a crustaceous testa: acaulescent 

 annuals: leaves pinnatifid : flowers {small) ichite or pcde yellow, turning to 

 rose-color. — Taraxia, Nutt. 



45. CE. brevifl.ora : sf emless, minutely pubescent or somewhat canescent ; 

 leaves lanceolate, interruptedly pinnatifid, somewhat petioled; the segments 

 short, obtuse, 1-2-toothed or entire ; flowers (small) scarcely longer than the 

 petioles ; tube of the calyx subulate, rather longer than the linear-lanceolate 

 segments; style shorter than the calyx-segments; capsules ovoid-oblongr 

 deeply 4-grooved, subulate with the persistent calyx-tube. — Taraxia brevi- 

 flora, Nutt. ! mss. 



Plains of the Rocky Mountains, with the succeeding. Leaves 3-4 inches 

 long, in a crowded tuft. Capsule, with the persistent calyx, about an inch long. 

 Seeds very numerous, oblong, terete, slightly incurved, smooth and even, or 

 obscurely striate. 



46. CE. NuttaUii: stemless, pubescent; leaves lanceolate, pinnatifid, 

 acuminate, petioled; tube of the calyx filiform, rather shorter than the 

 leaves ; the segments linear-lanceolate, acuminate, about the length of the 

 petals ; style longer than the calyx-segments ; capsules (very numerous) 

 subulate-conic, terete. — Taraxia longiflora, Nutt. ! mss. 



Plains in the Rocky Mountains, near Blackfoot River. July. — Leaves 

 crowded. Flowers larger than in Q2. breviflora : the ovary gradually atten- 

 uate into the very slender tube of the calyx ; which is 1-2 inches in length, 



