ONAGRACE.E. (EVENING-PRIMROSE FAMILY.) 105 



Var. lavandulaefolia, Watson. Taller, pubescent throughout: leaves 

 mostly linear and shorter : calyx-segments less attenuated above. (E. la- 

 vandulce folia, Torr. & Gray. From Kansas and Colorado to Mexico. 



14. CE. serrulata, Nutt. Leaves linear to lanceolate, denticulate: the 

 free cali/x-tips short : capsules 9 to 1 5 lines long. From New Mexico and 

 Texas northward to British America. 



4. Stigma capitate : calijx-tube obconic or short funnefform : flowers in crowded 

 bracteate or leaf if spikes : anthers oblong : capsule linear^ sessile, attenuated 

 above, curved and contorted. 



15. CE. strigulosa, Torr. & Gray, var. pubens, Watson. Pubescence 

 hirsute and spreading, sometimes nearly smooth : petals 1 to 2 lines long, yel- 

 low, usually turning red : capsule very narrow!// linear, often short-pedicelled. 

 Includes CE. dentala, Torr. & Gray. From the Wahsatch westward through 

 the Pacific States. 



16. CE. andilia, Nutt. Dwarf, 1 to 3 inches high, canescently puberulent : 

 flowers a line long, yellow : capsule fusiform, 3 to 6 lines long. From E. 

 Oregon to Montana, Wyoming, Nevada, and Utah. 



5. As in 4, but capsules linear to clavate, pedicelled and obtuse : caulescent : 

 flowers in loose, naked racemes : seeds oblong-lanceolate. 



17. CE. SCapoidea, Nutt. Puberulent or nearli/ glabrous: leaves low on 

 the stem, usually lyrately-pinnatifid : cali/x-tips not free : capsule 4 to 12 lines 

 long. From W. Wyoming and S. Idaho to S. Utah and Colorado. 



18. CE. brevipes, Gr. Like the last, but stouter: villous, not puberu- 

 lent: calyx-tips free, thick: capsule 1 to 3 inches long. 



Var. parviflora, Watson. Of a much more branching habit : the leaves 

 more distinctly pinnate : inflorescence more slender : flowers pale yellow, the 

 petals 2 to 3 lines long. Am. Nat. ix. 271. S. W. Colorado and S. Utah. 



5. CLARKIA, Pursh. 



Petals purple or violet. Anthers oblong or linear. Stigma with 4 broad 

 lobes. Capsule linear, attenuate above, somewhat 4-angled. Seeds angled 

 or margined. Annuals, with erect brittle stems: leaves on short slender 

 petioles, the uppermost sessile : flowers showy, nodding in the bud, in terminal 

 racemes. 



1. C. pulchella, Pursh. Leaves linear-lanceolate to linear: petals 3-lobed, 

 attenuate to a long claw which has a spreading tooth on each side : perfect sta- 

 mens with a linear scale on each side at base ; alternate stamens rudimentary 

 and flliform : capsule S-angled. Bitter-Root Valley, W. Montana, to Idaho, 

 Oregon, and Washington Terr. 



2. C. rhomboidea, Dougl. Leaves oblong-lanceolate to oblong-ovate: pet- 

 als entire, rhomboidal, with a short broad claw which is often broadly toothed : 

 anthers all perfect ; filaments with hairy scales at the base : capsule ^-angled. 

 From the Wahsatch to California and Washington Terr. 



6. STENOSIPHON, Spach. 



Tube of the calyx filiform or almost capillary, much prolonged beyond the 

 ovary, recurved or declined after flowering. Petals unguiculate, unequal. 



