202 ROSACEA. Geum. 



alternate with the segments. Petals 5. Stamens numerous, inserted into the disk that 

 lines the base of the calyx. Achenia numerous, crowded on the conical or cylindrical dry 

 receptacle, caudate with the terminal persistent styles. — Perennial herbs, with the leaves 

 (at least the lower or radical ones) pinnately divided. Flowers white, yellow or purplish. 



^ 1. Ei'GEUM, Torr. & Gr. Segments of the calyx rejiexed. Style jointed, geniculate and corUoried 

 above the middle ; the lower portion smooth, persistent, hooked at the point after the vpper 

 {usually hairy) portion falls off. 



1. Geum Virgima.num, Linn. Virginian Avens. 



Radical leaves pinnate, or lyrately pinnate, or trifoliolate ; cauline ones 3 - 5-foliolate, the 

 uppermost usually undivided, incisely serrate, softl}' pubescent or smoolhish ; stipules mostly 

 incised ; peduncles elongated and diverging in fruit ; bracteoles minute ; petals (white) about 

 the length of the calyx, cuneate-obovate ; carpels sparingly hispid ; upper joint of the style 

 hairy at the base. — Linn. sp. I. p. 500 ; Murr. in comtn. Gcett. 5. p. 30. t. 3 ; Willd. sp. 2. 

 p. 1113 ; Michx.fl. \.p. 301 ; Pursh, ft- \-P- 351 ; Ell. sk. 1. p. 572; Torr. ft. l.p.493; 

 Bigel. ft,. Bost. p. 206 ; Seringe in DC. prodr. 2. p. 550 ; Hook. ft. Bar. -Am. 1. p. 175 ; 

 Beck, hot. p. 101 ; Darlingt. ft. Cest. p. 301. G. album, Gmel. syst. 2. p. 861 ; Willd. 

 enum. 1 . p. 556 ; Pursh, I. c. ; Bigel. I. c. ; DC. I. c, iSfC. 



Stem I5 - 3 feet high, a little hairy or nearly smooth. Radical leaves on long petioles, 

 sometimes nearly undivided, but commonly spuriously trifoliolate, or pinnately divided with 

 5 large segments and several very small ones ; cauline ones on short petioles, the uppermost 

 nearl}^ sessile : leaflets broadly ovate or elliptical, 1 J - 3 inches long, usually acute. Pedun- 

 cles 1—3 inches long, terminating the branches. Flowers at first nodding, finally erect. 

 Calyx somewhat hairj' ; the segments reflexed : bracteoles subulate. Petals white or some- 

 times cream-color, scarcely 2 lines in length. Carpels in a roundish sessile head, bristly with 

 a few long straight hairs : style straight and smooth below the joint ; upper joint thicker than 

 the lower, at length falling ofT, leaving a minute but strong hook at the summit of the lower 

 portion. Receptacle densely hairv^. 



Borders of woods, thickets, etc. Fl. June - July. Fr. September. 



2. Geum strictum. Ait. Small-jloxcered Yellow Avens. 



Stem and petioles hispid ; radical and lower cauline leaves interruptedly and somewhat 

 lyrately pinnate, the leaflets cuneiform-obovate ; upper cauline leaves 3 - 5-foliolate, the 

 leaflets rhombic-ovate or oblong, acute, sharply toothed and incised ; stipules large, incised ; 

 petals (yellow) roundish-oval, longer than the calyx ; carpels hispid at the summit ; upper 

 joint of the style hairy towards the base. — Ait. Ketv. (ed. 1.) 2. p. 207 ; Willd. sp. 2. p. 1113; 

 Pursh, ft. 2. p. 351 ; Bigel. ft. Bost. p. 207 ; Torr. comp. p. 208 ; Hook. ft. Bar. -Am. 1. 

 p. 175 (excl. /3.); Torr. ^- Gr.ft. N. Am. \.p.42\. G. Canadense, Murr. comm. Gaett. 5. 

 p. 33. t. 4 (not of Jacq.); DC. prodr. 2. p. 550. G. ranunculoides, Seringe, I. c. 



