ROSE FAMILY 157 



becomes pulpy in fruit, styles lateral, achenes many, seed-like ; flowers in 

 corymbs or racemes on leafless stalks, perfect or dioecious ; leaves alternate, 

 basal, of 3-leaflets ; perennial by runners. 



1. Nutlets in distinct pits in the fleshy fruit F. virginidna 



2. Nutlets on the surface of the fleshy fruit F.vesca 



Geum Linne 1753 Avens 

 (Lat. name of the avens) 



Sepals 5, united into a hemispheric or obconic tube, usually with 5 

 alternating bracts, petals 5, yellow or rose-purple, stamens many, pistils 

 many, style thread-like, straight or jointed, persistent, somewhat hairy or 

 plumose below ; flowers solitary or in cyme-like clusters ; leaves deeply 

 pinnatifid to odd-pinnate ; perennial. 



1. Flowers yellow, erect; style bristle-like in fruit; 



terminal leaflet wedge-shaped, obovate or 

 heart-shaped G. strict urn 



2. Flowers purple or purplish, nodding ; style plumy 



in fruit G. rival e 



Holodiscus Maximowicz 1879 Holodiscus 



(Gr. holos, complete, diskos, disk) 



PI. 26, fig. 5. 



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

 | 20 on a circular ^disk about the ovary, pistils 5, becoming 1-seeded hairy 

 1 fruits ; flowers in terminal panicles ; leaves alternate, simple, toothed or 

 ■ lobed ; shrub. 



Stems 1-10 ft. high; leaves spatulate or wedge-shaped 

 to obovoid or ovate, toothed or lobed, silky beneath, 

 .5-4 cm. long H. dumosus 



Horkelia Chamisso and Schlechtendal 1827 

 (Named for Horkel, a German botanist) 



Sepals 5, united into a calyx with 5 alternating bracts, petals 5, white 

 or yellow, stamens 5-20 inserted on the calyx-tube, style thread-like, in- 

 serted near the base, pistils few ; flowers in cymes or panicles ; leaves pin- 

 nate with 10-20 pairs of leaflets ; perennial. 

 Stems 4-8 in. high ; petals spatulate, shorter than the 

 sepals H. Gordonii 



