TREES AND SHRUBS 



83 



Drupelets without cushions; stems near- 

 ly all woody; leaves small; fruit 

 hardly at all pulpy. 6. Oreobatus. 



Carpels becoming achenes; styles not ar- 

 ticulated to the ovary. 

 Hypanthium bearing bracts; achenes sev- 

 eral to many; more or less hairy. 

 Flowers yellow; leaves pinnately com- 

 pound; achenes not tailed. 7. Dasiophora. 

 Flowers white; leaves deeply lobed, not 

 compound; achenes with long plu- 

 mose tails. S. FALL.UGIA. 

 Hypanthium bractless; achenes mostly 

 fewer, 5 or less. 

 Hypanthium flat; carpels 5; flowers 

 white, small, numerous in a small 



panicle. 9. Sericotheca. 



Hypanthium funnelform or tubular; 

 flowers mostly solitary and larger. 

 Petals wanting; hypanthium long- 

 tubular; calyx deciduous from the 

 hypanthium; carpels solitary; 



achenes long plumose tailed. 10. Cerocarpus. 



Petals 5; hypanthium turbinate; calyx 

 persistent. 



Carpels about 5; achenes with long 



plumose tails. 11. Cowania. 



Carpels 1; achenes not plumose 



tailed. 12. Kunzia. 



I. ROSA L. Rose. 



Low, more or less spiny shrubs 6 feet high or less, with 

 mostly slender branches and odd pinnately compound leaves; stip- 

 ules conspicuous, adnate to the petioles; leaves 3 to 9 foliate; 

 flowers solitary or in few-flowered corymbs terminating the branches, 

 large and showy, 1 to 2 1 / 2 inches in diameter, pink or rose purple 

 fading lighter; hypanthium spherical or ellipsoidal, not braeteolate; 

 sepals 5, more or less foliaceous tipped; petals broadly ovate to 

 rotund; dry or somewhat succulent by the softening of the hypan- 

 thium. 



Hypanthium and fruit densely spiny; sepals all 

 or nearly all lobed. 



Young branches densely lepidote stellate; 



leaves usually wth 3 leaflets. 1. r. stellata. 



Young branches with a dense covering of 

 short, mostly gland-tipped spines, not 

 lepidote stellate; leaves mostly with 5 

 leaflets. 2. /? mirifica. 



Hypanthium not spiny; sepals not lobed. 

 Infrastipular spines not present. 



Flowers corymbose at the ends of the 



branches. 3. /?. suffulta. 



