438 KANUNCULACEAE 



lobed, ovate to broadly lanceolate, glabrous and thin : flowers solitary, nodding, bluish 

 purple, 18-36 mm. long : calyx cylindric below, but the sepals thin and widely spread- 

 ing above, their margins undulate : filaments hairy : persistent styles silky, not plumose. 

 [ Clematis crispa L. ] 



In marshes, southeastern Virginia to Florida and Texas. Spring and summer. The variety with 

 linear or linear-lanceolate leaflets, is V. crispa Wdlteri (Pursh) Small, [Clematis Walteri Purshj; it 

 ranges from South Carolina and Florida to Texas. 



2. Viorna Simsii (Sweet) Small. A climbing vine, with more or less pubescent 

 branches. Leaf-blades pinnate ; leaflets entire, lobed or trifoliolate, thick, reticulated, 

 generally mucronate : flowers solitary : calyx campanulate, less than 2.5 cm. long, purplish, 

 pubescent : sepals with recurved margined tips : filaments hairy : persistent styles more or 

 less pubescent, about 2.5 cm. long. [Clematis Simsii Sweet.] . 



In low grounds, southern Indiana to Nebraska and Texas. Spring and summer. 



3. Viorna Gattingeri Small. A slender branching vine 1-3 m. long, climbing over 

 rocks and bushes, the foliage copiously glandular. Leaves 1-1.5 dm. long ; blades pinnate ; 

 petioles less glandular than the stem ; leaflets membranous, lanceolate or broadly lanceo- 

 late, 1.5-5 cm. long, pubescent on both sides as well as glandular, acute or slightly acumi- 

 nate, ciliate : peduncles stoutish, 3-5 cm. long : bracts ovate, 5-10 mm. long : calyx 

 purple, 10-13 mm. long : sepals felt-like, elliptic or elliptic-lanceolate, often recurved 

 from the middle, crested near the edges below the apex, narrowed into recurved caudate 

 tips : filaments pubescent : achenes ovate-oval or elliptic, 6-7 mm. long, minutely pubes- 

 cent, each face with an ovate or oval impression : persistent styles erect or nearly so, curved 

 from below the middle, tawny green, 2 -2.5 cm. long, plumose. [Clematis Gattingeri Small.] 



On the banks of the Cumberland River, near Nashville, Tennessee. Summer. 



4. Viorna reticulata (Walt.) Small. A branching vine several m. long, with 

 minutely pubescent or glabrate foliage. Leaves numerous ; blades pinnately foliolate j 

 leaflets rather leathery, oblong, lanceolate, oval or suborbicular, 2-8 cm. long, acute or 

 apiculate, very prominently and conspicuously reticulated, entire or lobed : pedicels about 

 as long as the peduncles : flowers nodding : calyx about 2 cm. long, dull, canescent with- 

 out : sepals felty, lanceolate : achenes elliptic, 5-6 mm. long, silky : persistent styles plu- 

 mose, 4-5 cm. long. [Clematis reticulata Walt.] 



In thickets and dry soil, South Carolina to Texas and Florida. Spring and summer. 



5. Viorna versicolor Small. A branching vine 2-4 m. long, with glabrous and glau- 

 cous foliage or sometimes an indication of pubescence below the nodes. Leaves numerous ; 

 blades slender-petioled; leaflets firm, oblong to ovate-lanceolate, 2-7 cm. long, apiculate, 

 glaucescent and conspicuously reticulated above, conspicuously glaucous and prominently 

 reticulated beneath : pedicels as long as the peduncles or longer : bracts ovate, 2-2.5 cm. 

 long, or the secondary ones smaller and nearly oblong : calyx purplish, about 1.5 cm. 

 long : sepals lanceolate, glabrous, slightly recurved at the tip : achenes pubescent : per- 

 sistent styles plumose, 3.5-4.5 cm. long, white or nearly so. [Clematis versicolor Small.] 



On dry rocky ledges, Missouri and Arkansas. Summer. 



6. Viorna coccinea ( Engelm. ) Small. A vine several m. long, with branching 

 stems. Leaves numerous ; blades mostly pinnate on sometimes tendril-like petioles; leaf- 

 lets ovate to ovate-lanceolate or suborbicular, 4-6 cm. long, acute, obtuse or even notched 

 at the apex, entire or rarely lobed, glaucous and more or less prominently reticulated be- 

 neath, mostly truncate or subcordate at the base : flowers scarlet or purple-red, ovoid or 

 globose-ovoid, about 2 cm. long, nodding : sepals with spreading or recurved tips : achenes 

 mostly broader than long, 6-7 mm. wide, silky: persistent styles plumose, 3-5 cm. long. 

 [ Clematis coccinea Engelm. ] 



In thickets and along streams, Texas. Spring. 



7. Viorna obliqua Small. A climbing vine, with elongated stems. Leaves with long 

 petioles ; leaflets thickish, ovate or ovate-lanceolate, 3-8 cm. long, slightly acuminate, 

 erose-denticulate and undulate, truncate at the inequilateral base, long-stalked : calyx 

 conic, about 3 cm. long, sparingly pubescent without : sepals lanceolate, recurved at the tip. 



In pine lands, near St. Augustine, Florida. 



8. Viorna flaccida Small. A slender vine, the stems climbing over bushes, angled, 

 thinly pubescent or glabrous below, branched, enlarged below the nodes and there densely 

 hairy like the branchlets and petioles. Leaves many ; leaflets thin, oblong, ovate or ovate- 

 lanceolate, 2-10 cm. long, slender-stalked, apiculate or rarely acuminate, densely silky be- 

 neath, sparingly so above or glabrate, entire or nearly so : bracts similar to the leaflets, 

 but usually smaller and sessile or nearly so : peduncles usually slender, commonly in clusters 

 of 3's : calyx greenish to light lavender, about 1.5 cm. long, nodding : sepals pubescent 

 without like the lower surface of the leaflets, acutish, with very short tails : achenes rhom- 



