CEnothera. ONAGRACEiE. 495 



segments short, entire, obtuse ; flowers axillary (rather small) ; calyx when 

 young villous with very long flat hairs ; the segments shorter than the tube 

 and the roundish petals; stamens and style shorter tlian the petals; stigmas 

 short ; capsules cylindrical. 



" Plains of the Platte in the Rocky Mountains. June. — Stem about a 

 foot high. Leaves crowded, the younger ones somewhat canescent [and 

 sprinkled wiili hirsute flattish hairs] ; tin- terminal lobe of the lower leaves 

 oblong and entire. Flowers white, turning lo rose-color. Seeds not punc- 

 tate." JXutUtU. 



■i — 10. CE. roronnpifolia : perennial? niiruitely ])ul)esrenl and strigose; stem 

 ascending or erect ; leaves i)ectinate-pinnatilid, with linear acute segments ; 

 the lowermost somewhat entire ; flowers (small) axillary; tube of the calyx 

 filiform, abru])tly dilated at tiie summit, villous in the throat ; the segments 

 linear-lanceolate, shorter than the tube, longer than the entire roundish pe- 

 tals ; stamens shorter than the petals ; style exserled ; stigmas rather short 

 and thick ; ovaries hirsute. — GE. pinnatifida, Torr. ! in ann. lye. New York, 

 2. p. 201, not of Nut t. 



Forks of the Platte, Dr. James! — Leaves crowded. Corolla about an inch 

 broad when expanded. Fruit unknown. 



11. CE. j^aUida (Dous^i.) : perennial, glabrous; root creeping; stems as- 

 cending, very smooth, whitish, branched above ; leaves lanceolate or linear, 

 acute, entire or remotely serrulate or denticulate ; the radical ones sometimes 

 runcinately toothed or pinnatifid towards the base ; flowers (rather small) 

 axillary and terminating the branches ; calyx glabrous or with scattered 

 hairs ; the tube much longer than the ovary, and about twice the lenjjth of 

 the segments; petals retuse or erose-crenulate, scarcely longer than the sta- 

 mens and style ; capsules cylindrical (v.hite), somewhat contorted. — Dougl. 

 in hot. rcg. t. 1142 ; Hook. fl. Bor.-Am. \. p. 210. 



0. lej)tophrjlla : leaves narrowly linear. — CE. leptophylla, Nutt. .' 7nss. 



Conmiou in dry sandy soil west of the Rocky mountains, Douglas ! Mr. 

 Tolmie! P. Plains near the sources of the Platte, Nuttall ! — Stem 6 inches 

 to 2 feet high, rather woody at the base, with numerous spreading branches. 



-^12. CE. alhicaulis (Nutt.) : perennial ; stem erect, branched above, very 

 smooth and shining, white ; leaves linear or somewhat lanceolate, mostly en- 

 tire, acute, minutely pubescent beneath ; flowers axillary (rather small) ; 

 tiibe of the calyx longer than the ovary, and rather longer than the segments; 

 petals "roundish, entire, shorter than the calyx segments and ab(jut the 

 length of the stamens ;" style exserted ; capsules prismatic-cylindrical, 

 straight, truncate, nearly glabrous. — Null, in Fraser, cat., S^-gen.\.p. 245; 

 Torr. ! in arm. bjc. NewYork, 2. p. 201 ; Hvok.jl. Bor.-Am. \. p. 210 ; not 

 oC Pursh. Anogra Nuttalliana, Spach, I. c. 



Barrens along the Platte, Nuttall, Dr. James! Saskatchawan, Drummond. 

 — Calyx puberuleut. 



* * * Annual, biennial, or mostly perennial caulescent kerbs : flowers mostly di. 

 urnal : tube of the calyx linear-clavate : capsule obovate or clavate, often pedi- 

 cellate, with 4 carinate or winged angles and 4 intermediate ribs, tardily de. 

 hiscent, cartilaginous, the dissepiments often etanescent : seeds very numerous, 

 irregular or in several rows, horizontal ; testa membranaceous : leaves marked 

 with minute linear and roundish pellucid dots. — CEnotherium, Seringe, (excl. 

 spec.) 



t Flowers (large and showy) nodding before expansion, fragrant, white turning to 

 rose-color in fading : capsule almost ligneous. (Xylopleurum, Spach.) 



