HH THE FLORA OF IOWA. 



155. VlTIS CORDIFOLIA, Michx. Tall (or more rarely low) climb- 

 ing high, trunks not rarely 6' 9' in diameter: leaves middle-sized or 

 small (2' 2 ' 3' or 4' in diameter), heart-shaped, mostly entire or very' 

 slightly tri-lobed on the edges, with broad, shallow teeth, usually 

 smooth and shining, more on the upper than on the lower side, the 

 young ones sometimes, and very rarely the old ones, with short hair 

 on the ribs below; berries small, in large, mostly Loose bunches, 

 black, without a bloom, maturing late in the fall, usually only with 

 a single short and thick seed, marked by a prominent raphe. This 

 grows more especially in fertile soil, and is common in river and 

 creek bottoms. Engelm. in dth An. Rep. Insects Mo. 



156. VlTIS RIPARIA, Michx., ( / '. cordifolia, Michx., var. riparia^ 

 Gray.) Mostly a smaller plant than the last, but with largo- (3' 5' 

 in diameter) and more or less incisely 3-lobed, glabrous, shining (or 

 rarely when young, slightly hairy) leaves, the lobes long and pointed, 

 the teeth also more pointed than in V. cordifolia; berries usually 

 larger than in the last, mostly with a bloom, in smaller and often 

 more compact bunches, commonly I 2-seeded: seeds with a less 

 prominent raphe. This species prefers thickets or rocky soil on river 

 banks, ihe northern form has fewer and larger berries in a bunch, 

 and is easily distinguished from /'. cordifolia. The fruit ripens ear 

 lier than the former and is pleasanter. Engelm. in Insects Mo. 



189. Dalea LAXIFLORA, Pursh. -Glabrous, 3 4 high, erect, 

 branched above: branches slender and spreading; leaflets 4 5 pairs, 

 linear-oblong, 2"- 3" long, )/ 2 " wide, strongly dotted; spikes pani- 

 cled, few-flowered; flowers distant: bracts very broad, almost or- 

 bicular, glandular, coriaceous, glabrous, slightly cuspidate, embrac- 

 ing the flower: calyx deeply cleft, teeth long, setaceous, beautifully 

 plumose: corolla white, keel twice as long as the wings, vexillum 

 cordate, very small, sometimes with 4 approximated glands near the 

 middle. Flor. Co/., Port. &* Con/. 



241. POTENTILLA RIVALIS, Nutt. More slender than /'. .\~on\-- 

 gica, branched, villous or nearly glabrous; stipules lanceolate to 

 ovate, entire or toothed; leaves pinnate, with two pairs of closely 

 approximate leaflets, or a single pair and the terminal leaflet three- 

 parted, the upper leaves ternate; leaflets ovate or oblong-cuneate or 

 lanceolate, i'-2' long, more or less incised -serrate; cymes loose, less 

 leafy, with slender pedicels: bractlets and sepals equal, \y 2 3 

 long; petals minute; stamens 10 20: achenia usually smooth: re- 

 ceptacle short. -From the Missouri river to New Mexico. Not yet 

 found within our limits. 



Var. PENTANDRA, Watson. Leaves ternate. the lateral leaflets 

 of the lower leaves parted nearly to the base: stamens five, opposite 

 to the sepals. (P. pentandra, Engel.) Found only at Humboldt, 

 Humboldt County. Watson's Rev. in Proc. Am. .lead. VIII. 



277. Gaura coccinea, Nutt. Canescent, puberulent or glabrate; 

 stems suffruticose and fastigiately branched from the base, 6' 12' 

 high, very leafy, ascending: leaves lanceolate, linear-oblong or linear, 

 repand-denticulate or entire, 6" 12" long, closely sessile; flowers in 

 simple spikes terminating the leafy branches, rose-color, turning to 

 scarlet; bracts linear, rather persistent, longer than the ovaries; 

 calyx-segments linear oblong, shorter than the narrow infundibuli- 

 form tube, as long as the roundish, unguiculate petals: fruit ellipti- 

 cal, sessile, short, terete, 4-sided above. Flor. Co/., Port. &* Coul. 



297. I'll CEDANUM (?) \, DICAUL] . Nutt. Caulescent or some- 

 times scarcely so, minutely pruinose-pubescent, 3' 15' high: leafy 

 only at base: leaves bipinnate or ternate bipinnate, the segments in- 



