ROSACEAE. 205 



styles distinct or united; carpels numerous, sessile, within the 

 calyx-tube; akenes numerous, enclosed in the berry-like calyx- 

 tube. 



Leaves very glandular beneath. R. rubiginosa. 



Leaves not very glandular. 



Flowers small, about 2 cm. in diameter; calyx-lobes de- 

 ciduous from the fruit. R. gymnocarpa. 

 Flowers large, 3 cm. or more in diameter; calyx-lobes 



persistent. 



Flowers mostly solitary; fruit globose, 2 cm. broad. R. nutkana. 

 Flowers in corymbs; fruit ovoid or oblong, not more 



than 1 cm. broad. R. pisocarpa. 



Rosa rubiginosa L. Sweetbrier. Stems slender, 1-2 m. high, armed with 

 stout recurved prickles; calyx-lobes lanceolate, not foliaceous at the tips; fruit 

 oval, 1-2 cm. long. 



A sweet-scented species introduced from Europe and now abundant. 



Rosa gymnocarpa Nutt. Small shrub, about 1 m. high, armed with 

 numerous slender straight prickles; leaflets 5-9, elliptic, cuneate at base, 

 serrate, nearly glabrous, 5-20 mm. long; serratures and petioles glandular; 

 flowers mostly solitary, about 2 cm. in diameter; calyx-lobes acuminate, not 

 foliaceous appendaged, deciduous from the fruit; fruit oblong or pear-shaped, 

 about 1 cm. long. 



Dry woods, common. 



Rosa nutkana Presl. Stout, 1-2 m. high, armed with few but stout prickles; 

 leaflets 5-7, ovate or elliptic, obtuse, coarsely usually doubly serrate, 1-3 cm. 

 long, glabrous or somewhat pubescent, usually glandular on the petioles and 

 serratures; flowers mostly solitary, 4-8 cm. broad; calyx-lobes glandular, 

 foliaceous appendaged, persistent; calyx-tube globose, smooth; fruit globose 

 but varying to ovoid or pyriform, about 2 cm. in diameter; seeds large. 



In springy places. Usually the leaves are sprinkled with minute glands 

 beneath, but in one form they are sparsely pubescent, becoming glabrate. 



Rosa pisocarpa Gray. Very similar to R. nutkana, the leaves usually 

 finely pubescent; flowers smaller, about 3 cm. in diameter, usually in corymbs; 

 fruit ovoid or oblong, 5-10 mm. in diameter. 



Usually growing with R. nutkana. 



274. AGRIMONIA. 



Perennial herbs; leaves interruptedly pinnate with crenate- 

 serrate leaflets; flowers small, in spike-like racemes with 3-cleft 

 bracts; calyx- tube top-shaped or hemispherical, the throat beset 

 with hooked bristles, hardened in fruit and enclosing the akenes; 

 petals 5, yellow; stamens 5-15; styles terminal. 



Agrimonia gryposepala Wallr. Hirsute and somewhat glandular; stems 

 erect, branched, 90-120 cm. high; principal leaflets 7, unequal, oblong or the 

 terminal one obovate, coarsely serrate, pubescent especially on the nerves 

 beneath, usually with small leaflets between the principal ones; stipules coarsely 

 toothed; flowers 8-10 mm. broad; fruit reflexed, turbinate, its bristles mostly 

 spreading, the outer reflexed. 



Sumas Prairie, Lyall. 



