VOL. II.] 



CROWFOOT FAMILY 



5. Clematis Viorna L. lyeather- 

 flower. (Fig. 1586.) 



Clematis Viorna L. Sp. PI. 543- J 753- 



A vine, climbing to the height of 10 or 

 more over bushes in rich soil. Leaves mostly 

 pinnate; leaflets glabrous, entire, lobed or tri- 

 foliolate; uppermost and lowest leaves often 

 entire; calyx ovoid-catnpanulate, purple, the 

 sepals remarkably thick; flowers solitary; per- 

 sistent styles plumose throughout, i' long 

 or more, brownish. 



Southern Pennsylvania to Ohio and West Vir- 

 ginia, south to Georgia and Tennessee. Re- 

 ported from further north and west. Ascends 

 to 4000 ft. in Virginia. May-July. 



6. Clematis Addisonii Britton. Addi- 

 son Brown's Clematis. (Fig. 1587.) 



Clematis ovata T. & G. Fl. N. A. i: 8. 1838. 



Not Pursh, 1814. 

 C. Addisonit'Britton, Mem. Torr.Club, 2: 28. 1890. 



Ascending or erect, i-3 long, simple or 

 branched, tufted, glaucous and glabrous. 

 Lower leaves simple, entire or i-4-lobed, ob- 

 tuse, deep bluish-green above, glaucous be- 

 neath, sessile, clasping, 2 / -4 / long; upper 

 leaves pinnate, or sometimes simple, tendril- 

 bearing, leaflets 2-4, ovate, sessile, flowers soli- 

 tary, terminal and axillary, purplish, nodding; 

 calyx ovoid, 9 // -i5 // long, $"-7" broad, con- 

 tracted near the summit; sepals thick, lanceo- 

 late, acute, their tips recurved; stamens nu- 

 merous, pubescent above; achenes flat, nearly 

 orbicular, silky-pubescent; persistent styles 

 \'-\} f long, brown-plumose throughout. 

 Banks near Roanoke, Va. ; North Carolina and Georgia. May-June. 



Clematis viornioides Britton, is a hybrid between 

 this and C. Viorna. Roanoke, Va. 



7. Clematis ochroleuca Ait. Erect 

 Silky Clematis. (Fig. 1588.) 



Clematis ochroleuca Ait. Hort. Kew. 2: 260. 1789. 

 Clematis sericea Michx. Fl. Bor. Am. i: 319. 1803. 



An erect silky-hairy plant, i-2 high, some- 

 what woody at the base. Leaves simple, sessile, 

 ovate, obtuse, glabrous and reticulated above, 

 silky beneath, entire or occasionally lobed, mu- 

 cronate; flower terminal, nodding, io // long; 

 calyx cylindraceous, green; sepals thick, very 

 silky without, their tips recurved; head of fruit 

 erect; achenes scarcely oblique; persistent styles 

 yellowish-brown, plumose throughout, i / -2 / long. 



Brooklyn, N. Y. (locality now destroyed); abun- 

 dant in several localities on Staten Island; Pennsyl- 

 vania, and southward to Georgia. May-June. Local. 



