CARAGANA— PHILADELPHUS 181 



Caragana digitata Lamarck 1783 



A shrub 2-3.5 mm. high; leaves with 4 leaflets which are nearly 

 digitately arranged, cuneate, obovate or oblong, rounded or emarginate 

 at the apex, glabrous, 1-2.5 cm. long; flowers solitary, 1.5-2.5 cm. long, 

 yellow : digitata, like the fingers of the hand. 



Distributed from southern Russia to China. 



Var. grandiflora, with large flowers and usually large and broad 

 leaflets. 



Saxifragaceae Saxifrage Family 



Herbs, shrubs, vines, or sometimes trees ; leaves alternate or opposite 

 or whorled or basal ; flowers mostly perfect and regular, sometimes poly- 

 gamo-dioecious, racemose, cymose, or paniculate or sometimes solitary, calyx 

 mostly 5-lobed, sometimes 4-12 lobed, united below and adnate to the 

 concave or cup-shaped axis, petals mostly 5, sometimes 4 or all are lack- 

 ing, perigynous or epigynous, stamens mostly 5 or 10, or sometimes nu- 

 merous, disk usually present; carpels mostly 2, or 1 -several, united, 

 (sometimes only towards the base), styles as many as carpels or united into 

 one; fruit a capsule or a berry, seeds small and numerous. 



KEY TO THE GENERA 



1. Leaves opposite or whorled, not lobed, stamens 



more than 5 



a. Stamens more than 10, flowers white and 



showy, leaves opposite Philadelphus 



b. Stamens 3-10, flowers greenish, outer ones 



often sterile, leaves mostly in whorls of 3 Hydrangea 



2. Leaves alternate, lobed, stamens 4-5 Ribes 



Philadelphus Linne 1753 Syringa Mock Orange 

 (Gr. Philadelphon, a sweet flowering shrub) 



Shrubs with opposite, simple, toothed or entire leaves; flowers large 

 white or cream colored, terminal or axillary, in cymes, racemes or solitary, 

 calyx top-shaped, sepals 4-5, persistent, petals 4-5, rounded or obovate, 

 stamens 20-40, styles free united below, ovary 3-5-celled; fruit a 3-5-celled 

 capsule, seeds numerous. 



A genus of about 15 species, natives of North America, Asia and Cen- 

 tral Europe. In addition to the following 6 other species occur in the 

 southern and western parts of North America. 



