254 XLVIIL ROSACEA. Geum. 
* Styles articulated and geniculate, wpper joint deciduous. 
1. G. rtvyAte. Water Avens. Purple avens. oe 
Pubescent; st. subsimple; radical lwvs. lyrate; stip. ovate, acute; fls. nod- 
ding ; pet. as long as the erect calyx segments; upper joint of the persistent style 
plumose.—A fine plant, with drooping, purple flowers, conspicuous among 
the grass in wet meadows, Northern and Mid. States. Rhizoma woody, creep- 
ing. Stem 1—2f high, paniculate at top. Root leaves interruptedly pinnate, 
inclining to lyrate, 4—6’ long, terminal leaflet large, roundish, lobed and cre- 
nate-dentate. Stem leaves 1—3, 3-foliate or lobed, subsessile. Flowers sub- 
globose. Calyx purplish-brown. Petals broad-obcordate, clawed, purplish- 
yellow, veined. Jn.—The root is aromatic and astringent. : 
2. G. stricrum. Ait. Yellow Avens. ers 
Hirsute ; radical lvs. interruptedly pinnate ; cawline 3—5-foliate ; U/ts. obo- 
vate and ovate, lobed and toothed ; stip. large and erect ; bracteoles linear, shorter 
than the sepals; pet. roundish, longer than the calyx ;. sty. smooth, upper joint 
hairy.—Fields moist or dry, N. States and Brit, Am. Stem hispid at base, 2— 
3f high, dichotomous, and with spreading hairs at summit. Root leaves 5—8’ 
long, inclining to lyrate, the terminal leaflet largest, obovate and lobed. Flow- 
ers numerous, rather large, yellow. Receptacle densely pubescent. Jl. Aug. 
3. G. Vireiniinum. (G. album. Gmel.) White Avens. 
Pubescent; radical lvs. pinnate, ternate, or even rarely simple; cawline 
3—5-foliate or lobed, all unequally and incisely dentate, nearly smooth or softly 
pubescent; fs. erect; pet. not exceeding the calyx; sty. glabrous ; recep. densely 
hirsute—Hedges and thickets, Can. and U. S. Stem simple or branched, 
smoothish above. Leaves very variable in form, lower ones often 3-foliate, 
with long, (6—8’) appendaged petioles. Stipules mostly incised. Upper leaves 
simple, acute, sessile. Flowers rather small, white. Peduncles in fruit long 
and diverging. Jl. 
4. G. MacropHyLtium. Willd. Large-leaved Yellow Avens. } 
Hispid; radical ivs. interruptedly lyrate-pinnate, the terminal leaflet much 
the largest, roundish-cordate; cauline with minute, lateral leaflets, and a large, 
roundish, lobed, terminal one, all unequally dentate; pet. longer than the calyx; 
recep. nearly smooth.— White Mts.! Stem 1—2f high, stout, very hispid an 
leafy. ‘Terminal leaflets 3—5’ diam. Flowers yellow. Jn. Jl. 
5. G. vernum. T. & G. (Stylipus vernus. Raf.) 
Slender and slightly pubescent; st. ascending at base; radical Ws. pin- 
nately 5—9-foliate, with incised leaflets, or often simple and cordate, incisely 
lobed and dentate ; cauline Ilvs. 3—5-foliate or lobed; stip. large and incised; 
jis. very small; sep. reflexed; head of carpels globose, raised on a slender stipe. 
—Shades and thickets, Ohio! to Ill. and Tex. Stem 8—20! high, striate, di- 
or trichotomous at top, few-leaved and few-flowered. Petals yellow, and with 
Oe eat hardly more than 1” in length. Stipe of the head of carpels }/ long. 
r.—Jn. | 
# ** Styles not articulated, wholly persistent. Sieversia. R. Br. 
6. G. TRIFLORUM. Pursh. Twree-flowered Geum. 
Villous; st. erect, about 3-flowered; vs. mostly radical, interruptedly pin- 
nate, of numerous cuneate, incisely dentate leaflets; bracteoles linear, longer 
than the sepals; sty. plumose, very long in fruit.—Brit. Am. and the Western 
States! rare in the Northern. Stems scarcely a foot high, with a pair of oppo- 
site, laciniate leaves near the middle, and several bracts at the base of the long, 
slender petioles. Radical leaves 5—6’ long, the terminal leaflet not enlarged. 
Flowers rather large, purplish white. Styles 2’ long in fruit. May, Jn. 
7. G. Peckxu. Pursh. Peck’s Gewm. 
Nearly glabrous; st. erect, several-flowered, nearly naked; radical lws. 
iyrate-pinnate, the terminal leaflet very large, roundish, truncate at base, the 
lateral ones minute ; yet. much longer than the calyx.—White Mts.! Scape 9’ 
high (4—5, Bw. 12—18, T: g G.), with several small, incised bracts. Petioles 
3 5/ long, bearing 4 or 6, dentate, lateral leaflets 1—4” long, and ending ina 
half-round leaflet 2—4’ wide, lobed and dentate. Flowers 8” diam., yellow, ter- 
minal on the elongated branches. Jl. Aug, 
