500 ONAGRACEiE. CEnothera. 



even testa, sulcate and vnth a double crustaccous incurved crest-lihe appendage 

 along the inner side. — Pachylophis, Spach. (Descr. of the seed from ffi. 

 marginata.) 



X-^3. CE. c(Cspitosa (Nutt.) : almost stemless, caespitose; leaves lanceolate, 

 •acute, repandiy toothed or nearly entire, attenuate into a long margined 

 petiole, nearly glabrous; tube of fhe calyx 4 times the length of the carinate 

 acuminate segments ; petals (very large) deeply obcordafe, longer than the 

 declined stamens and style; anthers as long as the filaments; capsules, 

 nearly sessile, oblong-conical, somewliat 4-anglod ; tlie margin of the valves 

 tuberculate-cristate. — Nutt. ! m Fraser, cat. ; Bot. mas;, t. 1593; Pursh,Jl. 

 2. p. 735,- Nutt..' gen. 1. p. 246. CE. scapigera, Pursh, fl. 1. p. 263. 

 Pacliylophis Nuttallii, Spach, Onagr. j)- 36, t. 30,/. 1. 



Dry and denuded argillaceous hills, on the banks of the Missouri and 

 Platte, Lewis, Nuttall ! June-July. — Root very large- and succulent. 

 Corolla often 3 inches in diameter : the petals very broad, white, with yel- 

 lowish veins, reddish in withering. Seeds cylindric-ovate. {Nutt.) 



24. CE. montana (Nutt. ! mss.) : " stemless, somewhat c«>spitose ; leaves 

 broadly lanceolate, sinuate-toothed, pubescent on the margins, tapering into 

 a short petiole ; tube of the calyx about twice the length of the linear- 

 lanceolate acute (scarcely carinate) segments ; petals (large) broadly obcor- 

 date ; capsules sessile, cylindrical, conic, striated, even. 



"Plains of the Platte in the Rocky Mountains. — Nearly allied to CE. 

 CEespitosa ; but the petioles and margin of tlie leaves jiubescent, the capsules 

 not muricate, &c. Tube of the cal^'x about the length of the leaves," 

 Nuttall. 



J'" 25. CE. marginata (Nutt. ! mss.) : almost stemless, casspitose, villous- 

 'pubescent, especially along the margin of the leaves ; leaves lanceolate, on 

 long petioles, pinnatifid-toothed or runcinate ; tube of the calyx longer than 

 the segments : petals (large) dilated ; capsules pedicellate, oblong-cylindri- 

 cal, obscurely 4-sidod, ribbed, the margin of the valves slightly tuberculate. 

 — Hooli. (^' Am. hot. Beechey, suppl. ]). 343. 



Rocky Mountains in Upper California, about lat. 42°, Nuttall! Near 

 the Blue Mountains and on Snake River, Mr. Tolmie. — Leaves sometimes 

 toothed only towards the base, about the length of the calyx-tube. Flowers 

 large and handsome. Capsules an inch long (the pedicel about the same 

 length) coriaceous, hairy. Seeds ovoid, gibbous, appearing grooved along 

 the inner side by the appendage or fold of the testa on each side of the- 

 rajihe, extending from near the hilum to the chalaza. 



#***«» Decumbent caulescent perennial herbs : flowers (very large) erect 

 before expansion, diurnal, yellow, scarcely odorous : tube of the calyx very 

 long, thick, slightly and gradii,ally. dilated near the summit : capsule pedicel, 

 late, smooth and shining, veinless, coriaceo-membranaceous, tardily dehiscenty 

 somewhat compressed, very broadly A-winged : seeds ascending, in a single- 

 row in each cell, oval-obovate, with a crustaceo-membranaceous testa, appendi. 

 culate with a double membranaceous crest along the inner side from near the- 

 base to the chalaza. — Megapterium, Spach. 



26. CE. Missouriensis (Sims) : stems simple, decumbent : leaves coria- 

 ceous, lanceolate, acute, tapering into a short petiole, obscurely denticulate, 

 somewhat canescent when young ; flowers axillar}^ (very large) ; segments 

 of the calyx much shorter than the tube, about the length of the roundish- 

 ftabelliform mucronulate petals; stamens and style arcuate-declined; cap-. 



