422 FLORA. 



without; achenes rhomboid, 6-7 mm. long; style of fruit 2.5-3 mm. long. In 

 thickets, Ky. and Tenn. May. Type from Warren Co., Ky. 



8. Clematis giaucophyiia Small. Glaucous Clematis. Stem 2-5 mm., 

 climbing over bushes, glabrous. Leaves pinnate; leaflets simple, 3-lobed or 3- 

 ioliolate, ovate, 3-10 cm., prominently veined and glaucous beneath; sepals glossy 

 purple, lanceolate-acuminate, not very thick; styles in fruit 5-6 cm. long, tawny. 

 River valleys. N, Car. and Ky., south to Fla. June-July. 



9. Clematis Viorna L. ' Leather-* lower. (I. F. f. 1586.) A vine, climb- 

 ing to the height oi 3 111. or more over bushes. Leaves mostly pinnate; leaflets 

 glabrous, entire, lobed or trifoliolate; uppermost and lowest leaves often entire- 

 calyx ovoid-campanulate, purple; persistent styles plumose throughout, 2 cm. long 

 or more, brownish. In rich soil, S. Penn. to lnd. Mo., Ga. and Tenn May- 

 July. 



10. Clematis Addisonii Britton. Addison Brown's Clematis. (I. F. f. 

 1587.) Ascending or erect. 3-10 dm. long, tufted. Lower leaves simple, entire or 

 1-4- lobed, obtuse, deep bluish-green above, glaucous beneath, sessile, clasping, 

 5-10 cm. long; upper leaves pinnate, or sometimes simple; leaflets 2-4, ovate, ses- 

 sile; flowers solitary, purplish, nodding; calyx ovoid, 18-30 mm. long, contracted 

 near the summit; sepals thick, lanceolate, acute, their tips recurved; achenes flat, 

 nearly orbicular, silky pubescent ; persistent styles, brown-plumose throughout. 

 Banks near Roanoke, Va., and N. Car. May-June. 



Clematis viornioides Britton is a hybrid between this and C. Viorna. Roanoke, Va. 



11. Clematis ochroleuca Ait. Erect Silky Clematis. (I. F. f. 1588.) 

 An erect silky-hairy plant, 3-6 dm. high, somewhat woody at the base. Leaves 

 sessile, ovate, obtuse, glabrous and reticulated above, silky beneath, entire or 

 occasionally lobed, mucronate; flower terminal, nodding, 2 cm. long; calyx cylin- 

 draceous, green ; sepals thick, very silky without, their tips recurved ; head of fruit 

 erect; achenes scarcely oblique; styles yellowish-brown, 3-4 cm. long. S. N. Y. 

 and Penn. to Ga. May-June. 



12. Clematis ovata Pursh. Erect Mountain Clematis. (I. F. f. 1589.) 

 Similar to the preceding species; stems stiff, 3-6 dm. tall, pubescent when young, 

 becoming nearly glabrous when old. Leaves ovate, entire, 4-5 dm. long, strongly 

 reticulate-veined and nearly glabrous when mature; flowers solitary at the ends of 

 the stem or branches, nodding, about 2 cm. long; styles 3-4 cm. long. Kate's 

 Mountain, White Sulphur Springs, W. Va., and Negro's Head in S. Car., or Ga. 

 May-June. 



13. Clematis Fremontii S. Wats. Fremont's Clematis. (I. F. f. 1590.) 

 Stout, erect, 1.5-4 dm. high, the stem villous-pubescent, especially at the nodes, 

 simple or branched. Leaves sessile, coriaceous, conspicuously reticulated, glabrous 

 except on the veins beneath, broadly ovate, entire or sparingly toothed; flowers 

 terminal, nodding; calyx purple, 2.5 cm. long; sepals thick, tomentose on the mar- 

 gins, their tips recurved. Prairies, Kans., S. Neb. and Mo. Rare and local. April- 

 May. 



14. Clematis Scottii Porter. Scott's Clematis. (I. F. f. 1591.) Some- 

 what villous when young, nearly glabrous when old; stems erect, 2-6 dm. tall. 

 Leaves petioled, the upper pinnate or bipinnate, their segments entire or few- 

 toothed, stalked, acuminate or acute at the apex, narrowed at the base, 12-36 mm. 

 long; lower leaves sometimes entire; flowers solitary, long-peduncled, nodding, 

 about 2 cm. long, purple; sepals ovate-lanceolate, thick; persistent styles plumose 

 throughout, 2.5 cm. long or more, the plumes brown. In dry soil, S. Dak. to Neb., 

 Colo, and Idaho. May-July. 



19. ATRAGENE L. 



Perennial climbing vines, with opposite petioled compound leaves, and large 

 showy peduncled flowers, solitary in the axils, or at the ends of the branches. 

 Sepals very large, petaloid, mostly membranous and prominently veined. Petals 

 small, spatulate. Stamens very numerous, the outer ones usually with broadened 

 filaments. Styles long, persistent, plumose. [Ancient Greek name for some vine.] 

 About 5 species, natives of the north temperate zone. In addition to the following, 

 two occur in the Rocky Mts. and one in northwestern N. Am. 



