Vor. II.]J ROSE FAMILY. 221 
7- Geum flavum (Porter) Bicknell. Cream-colored Avens. (Fig. 1946.) 
TS ae 
7, 
eae 
Geum album var, flavum Porter, Bull. Torr. Club, 
16: 21. 1889. 
Geum Canadense var. flavum Britton, Bull. Torr. 
Club, 18: 270. 1891. 
G. flavum Bicknell, Bull. Torr. Club, 23: 523. 1896. 
Stem bristly-hairy below, erect, 114°-3° tall. 
Stipules large, often 1’ long, foliaceous, dentate 
orlobed. Basal leaves mostly pinnately divided, 
sometimes only lobed; lower stem-leaves usually 
also pinnately divided, the terminal segment 
often elongated; upper stem-leaves oval or lan- 
ceolate, sometimes entire; peduncles slender; 
flowers cream-yellow, about 3’’ broad; petals nar- 
rowly oblong, shorter than or little exceeding the 
reflexed calyx-lobes; head of fruit sessile, about 
5’’ in diameter; receptacle bristly-villous; style 
nearly glabrous to the base, jointed, 3/’-4”’ long. 
In woods, New York to Virginia. June-Aug. 
Geum urbanum I,., from Europe, distinguished by 
its bright yellow, broader and longer petals, is es- 
caped from cultivation at Cambridge, Mass. 
8. Geum macrophyllum Willd. Large- 
leaved Avens. (Fig. 1947.) 
Geum macrophyllum Willd. Enum. 557. 1809. 
Stout, erect, bristly-pubescent, simple or branched 
aboye,1°-3° high. Stipules broad, foliaceous; basal 
leavespetioled, lyrate-pinnate, the terminal segment 
much the largest, reniform, orbicular orcordate, den- 
tate, 3-7-lobed; lateral leaflets 3-6, oval or obovate, 
with smaller ones interspersed or borne on the peti- 
ole; stem-leaves short-petioled or sessile, the leaf- 
lets or lobes 2-4, cuneate; flowers several, terminal, 
short-peduncled, yellow, 5/’-10’’ broad; petals ob- 
ovate, exceeding the acute reflexed calyx-lobes; 
receptacle nearly glabrous; style slender, jointed, 
pubescent, at least below, 3/’-5’’ long. 
In low grounds, Nova Scotia and New England to 
Alaska and British Columbia, south to New York, 
Missouri, Colorado and Oregon. Also in northern 
Europe. May-July. 
g. Geum strictum Ait. Vellow Avens. 
(Fig. 1948.) 
Geum strictum Ait. Hort. Kew, 2: 217. 1789. 
Geum Canadense Murr. Comm. Goett. 5: 34. pl. g. f. B. 
1783. Not Jacq. 1772. 
Erect or ascending, pubescent, branched above, 2°-5° 
high. Stipules broad, foliaceous; basal leaves lyrate- 
pinnate; leaflets 5-7, obovate, cuneate, dentate or lobed, 
with a few smaller ones interspersed, the terminal one 
largest, broadly ovate or cuneate; stem-leaves sessile or 
short-petioled, with 3~5 ovate or oblong acute segments; 
flowers yellow, similar to those of the preceding spe- 
cies; receptacle downy-pubescent; style slender, 3//— 
4’’ long, jointed, pubescent below. 
In swamps or low grounds, Newfoundland to British 
Columbia, south to New Jersey, Pennsylvania, Missouri 
and Arizona, Also in northern Europe and Asia. June- 
Aug. A hybrid with G. Canadense has been found in 
eastern Pennsylvania. 
