White Avens

Geum canadense Jacq. Hort. Vind. 2: 82. 1773
Geum virginianum Murr. Novi Comm. Gott. 5: 32, in part. 1775. Not G, virginianum L1753. Geum carolinianum Walt. Fl. Car. 150. 1788. Geum album J. F. Gmel. Syst. Nat. 2: 861. 1791. Caryophyllata alba Moench, Meth. 660. 1794. Sieversia caroliniana G. Don, Gen. Hist. 2: 528. 1832.
Perennial, with a thick rootstock; stem 3-10 dm. high, finely pubescent or glabrate, or with scattered longer hairs, corymbosely branched above; basal leaves long-petioled; blades of the earlier ones reniform or rounded-cordate, round-lobed and dentate, those of the later usually ternate, with rhombic or obovate leaflets; lower stem-leaves ternate and short-petioled, the upper often simple and subsessile, ovate, acute, and 3-lobed; hypanthium glabrous or finely pubescent; bractlets linear, scarcely half as long as the lanceolate acuminate sepals, which are 5-7 mm. long; petals white, elliptic or oblong, seldom exceeding the sepals; fruiting head 10-12 mm. in diameter; carpels 30-50, rarely more; receptacle hispid; body of the achenes 2.5-3.5 mm. long, more or less bristly; lower internode of the style 4—5 mm. long, glabrous, the upper scarcely 1 mm. long, with a few hairs.
Type locality : Cultivated in the botanical garden of Vienna.
Distribution: Banks and among bushes, from Nova Scotia to Georgia, Texas, Kansas, and the Black Hills of South Dakota; central Mexico.

Geum meyerianum Rydberg
Geum agrimonioides C. Meyer, Ind. Sem. Petrop. 11: Suppl. 29. 1846. Not G. agrimonioides Pursh. 1814.
Perennial, with a thick rootstock; stem 3-10 dm. high, more or less hirsute; leaves, except the upper cauline ones, pinnate, with 3-7 leaflets; leaflets acuminate, obovate, ovate, or rhombic, incised or variously laciniate, or the terminal leaflet rounded, the upper leaflets often confluent; upper stem-leaves ternate or 3-lobed, the leaflets or lobes oblong-lanceolate, acuminate, dentate or sub-incised; bractlets linear, minute, one-fourth to one-third as long as the lanceolate acuminate sepals, which are about 6 mm. long; petals white or ochroleucous, elliptic or oval, about 6 mm. long, 3-4 mm. wide; receptacle densely hairy at least above; body of the achenes hispid above; upper internode of the style hispidulous, the lower internode 4 mm. long, glabrous.
Type locality: New York.
Distribution: Quebec and Ontario to Pennsylvania and the District of Columbia.

Geum camporum Rydberg, sp. no v
Perennial, with a thick rootstock; stem 5-10 dm. high, more or less short-hirsute, branched above; branches in fruit ascending-spreading; blades of the basal leaves firm, either simple, rounded-cordate, 3-6 cm. long, or ternate with rhombic-obovate divisions, somewhat lobed, irregularly dentate, sparingly pubescent on both sides; lower stem-leaves ternate, shortpetioled, the upper simple, rhombic-ovate, often 3-lobed, more or less acuminate; stipules obliquely ovate, coarsely toothed; hypanthium finely pubescent; bractlets linear, onethird to one-half as long as the ovate, shortacuminate sepals; petals ochroleucous, 4-5 mm. long, about equaling or somewhat shorter than the sepals, broadly obovate or suborbicular; fruiting head 15-18 mm. broad; carpels 50-80; receptacle hispid; body of the achenes 3-3.5 mm, long, more or less hispid; lower internode of the style 3-5 mm. long, glabrous, the upper 1-1.5 mm. long, with a few hairs.
Type collected at Manhattan, Kansas, August 11, 1892, J. B. Norton (herb. Columbia Univ.). Distribution: Moist woods and among bushes in the prairie region, from South Dakota and Minnesota to Texas and Arkansas.

Geum canadense, the white avens, is a plant in the rose family, Rosaceae. It is widespread across much of Canada, the United States, and Mexico.

It readily hybridizes with the introduced Geum urbanum. The hybrid is named Geum ×catlingii J.-P. Bernard & R. Gauthier