ROSE FAMILY 153 



middle of the ovary; Mowers solitary, axillary; leaves odd-pinnate, leaflets 



7-25 ; perennial by runners. 



Stems spreading, with runners ; leaves silky-silvery 



below, smooth, hairy or silvery above A. anserhia 



Aruncus Adanson 1763 Goatsbeard 

 (Gr. aryngos, goatsbeard) 



Sepals 5, united, petals 5, white, stamens many, inserted on the calyx, 

 pistils usually 3, becoming smooth few-seeded follicles ; flowers dioecious 

 in panicled spikes ; leaves 2-3-pinnate ; perennial. 

 Stems 2-6 ft. high ; leaves about 1 ft. long ; flowers 2-4 

 mm. wide A. silvester 



Cercocarpus H. B. K. 1823 Mountain Mahogany 



(Gr. kerkos, tail, karpos, fruit) 



PL 26, fig. 7, 8. 



Sepals 5, united into a narrow tube, contracted above, petals none, 

 stamens 15-25 in 2-3 rows on the calyx, pistil 1, forming a hairy achene, 

 style hair}', persistent, becoming long and plumy in fruit, seed 1 ; flowers 

 perfect, axillary or terminal, solitary or clustered ; leaves alternate, simple, 

 leathery ; shrubs. 



1. Leaves toothed, hairy, oval to obovate or round- 



ish C. p ami foli us 



2. Leaves entire, revolute, smooth, leathery, lance- 



oblong to linear C. ledifolius 



Chamaebatiaria Maximowicz 1879 

 (Resembling Chamaebatia, a low bramble) 



„ Sepals 5, united into a calyx, petals 5, white, stamens many, pistils 5, 

 hairy, follicles leathery, 1-valved, united at the base; flowers in terminal 

 leafy panicles ; leaves leathery, twice-pinnately dissected ; shrub. 

 Stems diffusely branched; leaves narrowly lanceolate C. millefolium 



Chamaerhodus Bunge 1829 Ground Rose 

 (Gr. chamae, on the ground, rhodon, rose) 



Sepals 5, united into a bell-shaped calyx, petals 5, white, stamens 5, 

 opposite the petals, pistils 5-10, style inserted near the base of the ovary; 

 flowers in a two-forking cyme-like cluster; leaves once or twice ternately 

 many-cleft ; perennial. 



Stems 4-12 in. high;. basal leaves forming a rosette; 

 petals obovate C. erecta 



