Fragaria. rosacea. 447 



38. P. pentandra (Engelmann, mss.) : hirsute ; stem erect (3-4 feet high) ; 

 lower leaves palinately S-foliolato, on long petioles; the upper leaves 3-fnIif)- 

 late, on .siiort petioles; leaflets oblanroolatr, obtuse, cuueate at the base, 

 coarsely and often doubly toothed, pubescent beneath, liairy above ; stipuU's 

 lanceolate, acute, incisely toothed ; flowers (very small) in lar2;e (H( lioio- 

 mous cynics; peduncles filifonu, hirsute ; segments of the calyx longer than 

 the spatulale (pale yellow) petals, and sliorter than the bracteolar segments ; 

 etamens 5—6; achenia very small, smooth. 



Shady moist places, near Fort Gibson, Arkansas. June. — This species 

 we have not seen : the description is furnished by Dr. Engelmann. The 

 habit of tlic ])lant is said to be like P. recta, but the flowers more like P. 

 supina. 



21. COMARUM. Linn. gen. p. 257 ; Lam. ill. (. 444. 



Calyx flat, deeply 5- (rarely 6-7-) cleft, colored within, willi as many 

 much smaller alternate deflexed bractcoles. Petals 5, ovate-lanceolate, acute 

 or acuminate, very small, somewhat persistent. Stamens numerous, insert- 

 ed into the thickened and hairy slightly lobed disk which lines the bottom of 

 the calyx : filaments subulate, persistent. Achenia aggregated on the convex, 

 at length very large and fleshy or spongy, hairy persistent receptacle : styles 

 filiform, at length deciduous, inserted below the apex of the ovary : stigmas 

 simple. Seed inserted next the insertion of the style, pendulous. Radicle 

 superior. — A perennial herb, creeping at the base, with pinnate leaves. 

 Stipules of the lower leaves scarious and wholly adnate to the petiole. Pe- 

 tals, stamens, and styles, as well as the upper side of the sepals, dark 

 purple. 



C.paliisfre (Linn. !)— F/. Dan. t. 636; Miclix.! Jl. 1. p. 302; Engl. hot. 

 t. 172 ; Pursh ! Jl. 1. p. 156 ; Richards. ! oppx. Frankl. journ. ed. 2. p. 21 ; 

 Bigel. ! jl. Bost. ed. 2. p. 203. Potent ilia palustris, Scopoli, fl. Cam. (ed. 

 2.) 1. p. 359 ; Lchm. 1 Pol. p. 62 ; 7brr. .' Jl. 1. p. 498 ; DC. ! prodr. 2. 

 }). 583 ; Hook. ! fi. Bor.-Am. 1. p. 187. P. Comaruin, Ncstl. 



In sphagnous swamps. Northern States ! and Canada ! Labrador ! and 

 Greenland ! to the Arctic Circle, Kotzebue's Sound ! &c. June-July. — Root 

 astringent. Stems 1-2 feet high. Leaflets 5-7, crowded, lanceolate-oblong, 

 mostly obtuse, minutely silky. Flowers large. Segments of the calyx 

 ovate, acuminate. Achenia glabrous. — Marsh Cinque-foil. 



22. FRAGARIA. Tourn. ; Linn. gen. p. 255. 



Calj'x, corolla, and stamens the same as in Potentilla. Achenia dry, scat- 

 tered on the enlarged succulent or pulpy receptacle, which at length often 

 separates from the conical central portion of the torus : styles deeply lateral, 

 attenuate at the insertion, rather thickened upwards : stigma depressed. Seed 

 inserted next the base of the style, amphitropous, ascending. Radicle supe- 

 rior. — Perennial stoloniferous herbs, with trifoliolate leaves ; tlie leaflets 

 coarsely toothed. Scajies cymosely several-flowered. Petals (mostly) 

 white. Receptacle red, or whitish ; when ripe, edible. — Strawberry. 



• 1. F. Virginiana (Ehrh.) : fruit roundish-ovoid; the aciienia imbedded 

 in the deeply pitted receptacle ; calyx spreading in fruit ; peduncles coni- 



