RANUNCULACEAE 439 



boidal or nearly orbicular, stout, 6-7 mm. long, more or less inequilateral, thick -margined : 

 persistent styles plumose, 2.5-3 cm. long. [Clematis flaccida Small.] 

 In thickets, Kentucky and Tennessee. Spring. 



9. Viorna Vidrna (L. ) Small. A vine, climbing to the height of 3 m. or more. 



Leaves numerous, deep green ; blades mostly pinnate ; leaflets glabrous, entire, lobed or 



3-foliolate, the uppermost and lowest leaves often entire : calyx, ovoid-campanulate, purple : 



sepals exceedingly thick : flowers solitary, nodding : persistent styles plumose throughout, 



2.5 cm. long or more, brownish. [Clematis Viorna L. ] 



In woods, southern Pennsylvania to Ohio, West Virginia. Georgia and Alabama. Spring and 

 summer. Leather-flower. Va.se-vine. 



10. Viorna glaucophylla Small. A showy bright green vine, the stem rather 

 slender, 2-5 m. long, climbing over bushes and trees, nearly simple, dark red, furrowed, 

 "much enlarged at the nodes. Leaves ovate, 3-10 cm. long, thickish, acute, often apiculate or 

 acuminate, entire, 3-lobed or 3-foliolate, often with conspicuous white nerves above, promi- 

 nently nerved and glaucous beneath, cordate or subcordate ; bracts leaf-like with petioles 1 

 cm. long, tiie nerves gradually diverging from the midrib : calyx reddish purple, glossy, 

 2-2.5 cm. long, thick, conic-ovoid : sepals lanceolate, acuminate, the tips very slightly 

 spreading : achenes suborbicular, 6-8 mm. in diameter, puberulent, abruptly narrowed at 

 both end.s, each with an orbicular impression in the middle, sometimes slightly inequi- 

 lateral : plumose style erect or slightly oblique, 5-6 cm. long, tawny, lustrous, the hairs 

 spreading. [Clematis glaucophylla Small.] 



In river valleys, Kentucky to North Carolina, Florida and Alabama. Spring.and early summer. 



11. Viorna Addlsonii (Britton) Small. A shruby or stocky vine, 3-10 dm. long, 

 simple or often branched, glaucous and glabrous. Lower leaf-blades simple, entire or 

 1-4-lobed, obtuse, deep bluish green above, glaucous beneath, sessile, clasping, 5-10 cm. 

 long : upper leaf-blades pinnate, or sometimes simple, tendril-bearing ; leaflets 2-4, ovate, 

 sessile : flowers solitary, terminal and axillary, purplisli, nodding : calyx ovoid, 18-30 mm. 

 long, contracted near the summit : sepals thick, lanceolate, acute, their tips recurved : 

 stamens numerous, pubescent above : achenes flat, nearly orbicular, silky-pubescent : per- 

 sistent styles 2.5-3 cm. long, brown-plumose throughout. [Clematis Addisonii Britton.] 



On river banks, Virginia to North Carolina and Tennessee. Spring. 



12. Viorna ochroleuca (Ait.) Small. An erect plant, 3-6 dm. tall, sometimes 

 woody at the base, with silky-hairy foliage. Leaf-blades sessile, ovate, obtuse, glabrous 

 and reticulated above, silky beneath, entire or occasionally lobed, mucronate : flower ter- 

 minal, nodding, 2 cm. long : calyx cylindraceous, green : sepals thick, very silky without, 

 their tips recurved : head of fruit erect : achenes scarcely oblique : persistent styles erect, 

 yellowish brown, plumose throughout, 2.5-5 cm. long. [Clematis ochroleuca Ait.] 



In sandy soil, Staten Island, New York and Pennsylvania to Georgia. Spring. 



13. Viorna ov^ta (Pursh) Small. Similar to the next preceding species in habit, 

 the stems 2-6 dm. tall, pubescent when young, becoming nearly glabrous when old. Leaf- 

 blades ovate, entire, 3-6 cm. long, strongly reticulate-veined and nearly glabrous when 

 mature : flowers solitary at the ends of the stem or branches : calyx purple, nodding, 2.5 

 cm. long : achenes distinctly oblique : persistent styles nearly horizontal, plumose through- 

 out, the plumes white or slightly dingy, 2.5-4 cm. long. [Clematis ovata Pursh.] 



In dry soil, Kate's Mountain, West Virginia and apparently first collected on Negro's Head, a 

 mountain of the Blue Ridge in South Carolina or Georgia. Spring. 



14. Viorna Baldivinii ( T. & G. ) Small. An erect, simple or sparingly branched 

 plant, with a more or less woody base and glabrate foliage. Leaf-blades various, the 

 lower ones linear to lanceolate or oblong, 3-10 cm. long, apiculate or rarely acute, sessile, 

 the upper ones entire, or 3-cleft or 3-parted : peduncles 2-4 dm. long, strict : flower nod- 

 ding, solitary: calyx 2-3 cm. long, purple or paler, suggesting that of V. crispa: sepals 

 linear-lanceolate, spreading or recurved from above the middle : head of fruit conspicuous : 

 achenes elliptic or ovate-elliptic, more or less rhomboidal : persistent styles very plumose, 

 6-10 cm. long. [Clematis Baldwinii T. & G. ] 



In pine lands or hammocks, peninsular Florida. Spring to fall. Pine Hyacinth. 



18. ATRAGENE L. 



Perennial climbing vines, with glabrous or nearly glabrous foliage. Leaves opposite : 

 blades petioled, compound. Flowers large, showy, peduncled, solitary in the axils or at 

 the ends of the branches. Sepals very large, petal-like, mostly membranous and promi- 

 nently veined. Petals small, spatulate. Stamens very numerous, erect, the outer filaments 

 more or less petal-like. Styles very long, persistent, plumose at maturity. Bell Rue. 



