— 
Vor,. II.] CROWFOOT FAMILY. 
5. Clematis Viorna L. Leather- 
flower. (Fig. 1586.) 
Clematis Viorna J. Sp. Pl. 543. 1753: 
A vine, climbing to the height of 10° or 
more over bushes inrichsoil. Leaves mostly 
pinnate; leaflets glabrous, entire, lobed or tri- 
foliolate; uppermost and lowest leaves often 
entire; calyx ovoid-campanulate, purple, the 
sepals remarkably thick; flowers solitary; per- 
sistent styles plumose throughout, 1’ 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 yooo ft. in Virginia. May-July. 
6. Clematis Addisonii Britton. Addi- 
son Brown’s Clematis. (Fig. 1587.) 
Clematis ovata T. & G. Fl. N. A. 1: 8. 1838. 
Not Pursh, 1814. 
C. Addisonii Britton, Mem. Torr. Club, 2: 28. 1890. 
Ascending or erect, 1°-3° long, simple or 
branched, tufted, glaucous and _ glabrous. 
Lower leaves simple, entire or 1-4-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/’-15’’ long, 5’’—7’” broad, con- 
tracted near the summit; sepals thick, lanceo- 
late, acute, their tips recurved; stamens nu- 
merous, pubescent above; achenes flat, nearly 
N > orbicular, silky-pubescent; persistent styles 
GL —/ NWW'F 1/-1{’ 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 ochroletca Ait. Erect 
Silky Clematis. (Fig. 1588.) 
Clematis ochroleuca Ait. Hort. Kew. 2: 260. 1789. 
Clematis sericea Michx. Fl. Bor. Am. 1: 319. 1803. 
An erect silky-hairy plant, 1°-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, 10’’ 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, 1/-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. 
