1-'>'2 . ROSACEA. (rose family.) 



§ 1. GE^^^ proper. Sli/Zis jointed and bent near the middle; the hirer portion 

 persistent, indeed, hooked at the end (tflcr the dejiexid and most/;/ somewhat hairij 

 upper joint fulls awai/: head of /ntil sessile in the calyx: calyx-lobis rejiexcd. 

 (Floicers sometchat ]>anicled at the summit of a leafi/ stem: achcnia in our 

 species glabrous or nearly so beluw, more or less bristly at the top or along the base 

 of the style.) 

 * Petuls white or pale greenish-yellow, small, spatulate or oblong: stipules small. 



1. G. album, Ginclin. Smoothish or sojlly intbescent; stem slender {2° hh^h); 

 root-leaves of3-5 leaflets, or simple and rounded, with a few minute leaflets on 

 the petiole below ; those of the stem 3-dividcd or lohcd, or only toothed ; petals 

 about the length of the calyx ; receptacle of the fruit densely bristly-hirsute. — Bor- 

 ders of Avoods, &c. : common. May -Aug. — Too near the European G. urba- 

 num ; probably a white or whitish-flowered form of it. 



2. G. Virginianum, L. Bristly-hairy, especially the stout stem ; lower and 

 root-leaves pinnate, very various, the upper mostly 3-parted or divided, incised ; 

 petals inconspicuous, shorter than the calyx ; receptacle of the fruit glabrous or 

 nearly so. — Borders of woods and low grounds: common. June -Aug. — 

 Heads of fruit larger than in the preceding, on stouter hirsute peduncles. 



* * Petals golden-yellow, conspicuous, broadly obornte, exceeding the calyx: stipules 

 larger and all deeply cut. 



3. G. maci'Ophyllum, Wilid. Bristly-hairy, stout (1°- 3° high) ; root- 

 leaves lyratcly and interruptedly pinnate, with the terminal lenflit very large and 

 round-heart-shaped ; lateral leaflets of the stem-leaves 2-4, minute, the terminal 

 roundish, 3-cleft, the lobes ivedge-form and rounded: receptacle of the fruit neaily 

 naked. — Around the base of the White Mountains, New Hamjjshirc, also North- 

 ern Michigan, Illinois, and northwestward. June. (Eu.) 



4. G. Strictum, Ait. Somewhat hairy (3° -5° high); root-leaves inter- 

 ruptedly pinnate, the leaflets wedge-obovate ; leaflets of the stem-lenves 3-5, rhom- 

 bic-ovate or oblong, acute; receptacle of fruit downy. — Moist meadows: common, 

 especially northward. July, Aug. (Eu.) 



§ 3. STYLIPUS, Ilaf. Styles smooth: head of fruit conspicuously stalked in the 

 calijx: bractiets of the calyx none: otherwise nearly as % 1. 



5. G. v6rnum, Torr. & Gr. Somewhat pubescent ; stems ascending, few- 

 leaved, slender ; root-leaves roundish-heart-shaped, 3 - 5-lobed, or some of them 

 pinnate, with the lobes cut ; petals yellow, about the length of the calyx ; recep- 

 tacle smooth. (Stylipus vernus, Raf.) — Tliickcts, Ohio to Illinois and Ken- 

 tucky. April -June. 



§ 3. CARYOPIIYLLATA, Tourn. Style jointed and bent in the middle, the up- 

 per joint plumose : floicers large : ralyx erect or spreading : petals erect. 



6. G. riv^le, L. (Water, or Turi'LE Avkns.) Stems nearly simple, 

 several-flowered (2° high) ; root-leaves lyrate and interruptedly pinnate ; those 

 of the stem few, 3-foliolate or 3-lobed ; petals dilated-obovate, refuse, contracted 

 into a claw, purjdish-orangc ; head of fruit stalked in the calyx. — Bogs and wet 

 meadows, New England to Ponn., Wisconsin, and northward. May. — Blos- 

 soms nodding, but the feathery fruiting heads upright. Calyx brown-purple. 

 (Eu.) 



