SAXIFRAGACEAE. 85 



perfect polypetalous white flowers terminating the branchlets ; 

 and half-inferior pointed ovoid many-seeded capsules dehiscing 

 part-way from the top. 

 Leaves ovate to oblong, rough, often 3-nerved. F. rupicola. 



JAMESIA. 



Deciduous shrubs with flaking bark ; rather slender roundish 

 twigs ; rather large rounded continuous brownish pith ; opposite 

 low narrow U-shaped leaf-scars with 3 bundle-traces ; no stipule- 

 scars ; simple rather small leaves with their dilated petioles 

 meeting around the stem ; perfect polypetalous moderately small 

 w r hite flowers in small terminal clusters ; and ovoid beaked 

 small-seeded inferior capsules. 

 Leaves ovate, serrate, woolly beneath. J. americana, 



RIBES. Currant. Gooseberry. 



Deciduous often prickly shrubs with soft brownish wood* 

 with minute ducts in more or less evident tangential rows and 

 rather heavy medullary rays ; terete or somewhat angled mod- 

 erate twigs ; roundish continuous colored pith ; alternate trans- 

 verse or openly U-shaped somewhat raised leaf-scars with 3 

 bundle-traces ; no stipule-scars ; ovate or round somewhat lobed 

 and toothed moderate or small leaves ; small perfect polypetalous 

 flowers, with cup- or salver-shaped calyx, clustered or racemed 

 from the axils ; and small inferior several-seeded berries. 



1. Leaves with prominent sessile resin-glands. R. americanum. 

 Leaves without resin-glands. 2. 



2. Leaves truncate or cuneate at base : calyx-tube long 



and slender. (Golden Currants). 3. 

 Leaves not cuneate : calyx-tube shorter. 4. 



3. Calyx-tube twice as long as sepals. R. odoratum. 

 Calyx-tube little longer than sepals. R. aureum, 



4. Prickly at least at the nodes : leaves pubescent. 5. 

 Stems not prickly : leaves glabrescent. 7. 



5. Petioles pubescent and also with gland-tipped hairs : 



fruit usually prickly. R. Cynosbati, 



Petioles gray-pubescent, scarcely glandular. 5. 



