136 Flora of the Palouse Regio?i 



Stamineal tube half as long as the anthers. 



Plant glabrous. D. IXTEGRIKOLIUM. 



Plant viseid-puberulent. D. cusickii. 



vStamineal tube very short. D. coxjugexs. 



D. integrifolium Hook. Glabrous throughout, 15-45 cm. high: leaves 

 spatulate-oblanceolate, obtuse, entire or rarely denticulate, 5-10 cm. long, 

 narowed into a winged petiole as long: umbels 5-20-flowered: bracts of the 

 involucre triangular-lanceolate, acute, 6-20 mm. long: pedicels 1-6 cm. long: 

 calyx-lobes broadly lanceolate, acute or acuminate, not much longer than 

 the tube: petals purple, 1 cm. long: stamineal tube yellow, half as long as 

 the purple anthers: capsules ovoid, 6-9 mm. long, splitting into 5 teeth at 

 the apex when mature. Wet meadows rare. 



D. cusickii Greene. (D. pitbernlentum Heller.) Resembling the pre- 

 ceding very closely, but viseid-puberulent throughout: leaves usually small- 

 er: scapes 10-30 cm. high. Stony hillsides, common. 



D. conjugens Greene. Glabrous throughout, 10-30 cm. high: leaves 2-3, 

 rarely more, oblanceolate, obtuse, entire, 5-10 cm. long, narrowed at base 

 into a short petiole: flowers usually solitary, less commonly 2, 3 or more: 

 calyx-lobes oblong-lanceolate, acute, twice as long as the tube: petals 1.5-2 

 cm. long, dark-purple: capsules oblong, 10-12 mm. long, circumscissile near 

 the top, then deeply splitting into truncate teeth. Low copses, rare. 



Family 59. G&NTIANACEAE. 



Mostly herbs: leaves entire, opposite, sessile, without stipules: 

 flowers perfect, regular, solitary or clustered: corolla gamopetalous, 

 4-12-parted: stamens as many as the corolla-lobes and alternate 

 with them, epipetalous: ovary i-celled, with 2 parietal placentae: 

 fruit a capsule, usually 2-valved; seeds numerous; endosperm 

 copious. 



Style filiform, usually deciduous; anthers oblong to linear, mostly twisting 



or curving with age. 227. eryThraea. 



Style stout and persistent or none: anthers remaining straight. 



Corolla funnelform or bell-shaped, without glands. 228. GENTIANA. 

 Corolla rotate, with a fringed glandular spot on each lobe. 



229. FRASERA. 



227. ERYTHRAEA. 



Low branching annual herbs: leaves sessile or clasping: flowers 

 white or reddish: calyx 4-5-parted: corolla funnel or salver-form, 

 4-5-parted, the tube slender: anthers exserted, erect, oblong to 

 linear, twisting spirally with age: style filiform, usually deciduous; 

 stigmas capitate or 2-lipped. 



E. muhlenbergii Griseb. Annual, erect, simple or with many erect 

 branches, 10-20 cm. high, glabrous, flowering almost from the base: leaves 

 oblong or ovate, obtuse: flowers white, rarely pink, about 1 cm. long, mostly 

 sessile, in leafy cymes: corolla-tube longer than the calyx, its spreading 

 lobes short, obtuse. .Springy places, rare. Our form is not typical. 



