ROSACEAE (ROSE FAMILY) 485 



2. F. Ulmaria (L.) Maxim. (Queen of the Meadow.) Leaves canesceiit- 

 tnmentose beneath; terminal leaflet o-o-lobed, lobes ovate, doubly serrate ; the 

 lateral leaflets mostly unlobed ; petals white. (Spiraea L. ; Ulmaria Barnhart.) 



— Commonly cultivated ; established at several places in N. E. and Que. July. 

 (Introd. from Eurasia.) 



17. GEUM L. AvENS 



Calyx bell-shaped or flattish, deeply 5-cleft, usually with 5 small bractlets at 

 the sinuses. Petals 5. Stamens many. Achenes numerous, heaped on a coni- 

 cal or cylindrical dry receptacle, the long persistent styles forming hairy or 

 naked and straight or jointed tails. Seed erect; radicle inferior. — Perennial 

 herbs, with pinnate or lyrate leaves. (A plant name used by Pliny.) 



§ 1. EUGEUM T. & G. Styles jointed and bent near the middle, the upper 

 part deciduous and mostly hairy, the hncer naked and hooked, becoming 

 elongated ; head of fruit sessile in the calyx ; calyx-lobes rejlexed. 



* Petals tchite or pale greenish-yellou\ small, spatulate or oblong ; stipules small. 



-+- Receptacle of the fruit densely hairy. 



1. G. canadense Jacq. Stem (O.O-l.l m. high) and petioles sparingly hai^-y ; 

 leaves soft-pubescent beneath or glabrate, the basal of 3-5 leaflets or undivided, 

 those of the stem mostly o-divided or -lobed, rather sharply toothed ; stipules 

 ovate-oblong, 1-1.5 cm. long, subentire ; petals white. (G. album J. F. Gmel.) 



— Borders of woods, etc., widely distributed. 



2. G. flavum (Porter) Bicknell. Stem and petioles hirsute ; leaves much as 

 in the preceding but more bluntly toothed ; stipules ovate or obovate, tisually 

 about 2 cm. long, conspicuously cleft; petals greenish-yellow. — Dry woods, Ct. 

 to 0. and Va. 



-t- ■»- Receptacle of the fruit glabrous or nearly so. 



3. G. yirginianum 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 ; heads of fruit larger, the short 

 stout peduncles hirsute with reflexed hairs ; receptacle glabrous or nearly so. — 

 Borders of woods and low grounds ; common. June-Aug. 



** Petals golden-yellov}. conspicuous, broadly obovate. exceeding the calyx; 



stipules larger and all deeply cut. 



•t- Terminal segment of leaves suborbicular, finely crenate-dentate. 



4. G. macrophyllum AYilld. Bristly-hairy, stout. 3-9 dm. high ; root-leaves 

 lyrately and interruptedly pinnate, with the terminal leajiet very large and round 

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

 ish, 3-cleft, the lobes ivedge-form and rounded ; receptacle nearly naked. — Rich 

 soil, Nfd. to Alaska, s. to ints. of n. N. P]. and N. Y., Mich., n. Wise, Minn., 

 Col, and Cal. (N. E. Asia.) 



•*- -*- Terminal segment of leaves cuneate-obovate or oblanceolate. 



++ Leaves incisely toothed; body of ripe achene 1-2 mm. long. 



5. G. strictum Ait. Somewhat hairy, 9-15 dm. high ; root-leaves inter- 

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

 rhombic-ovate or oblong, aciite ; receptacle downy. — Moist meadows, thickets, 

 etc., Nfd. to B. C, s. to N. J., Pa., 111., Mo., and N. Mex. July, Aug. (Asia.) 



++ -M- Leaves bluntly toothed; body of ripe achene 4-5 mm. long. 



6. G. urbXnum L. Smoothish, loosely branclied ; segments of stem-leaves 

 mostly rhombic-obovate ; petals yellow, about equaling the calyx. — Established 

 in Cambridge, Mass. (Adv. from Eu.) 



