244 



Thymelaeaceae. 



Daphne. Mezereon. 

 (Family Thymelaeaceae). 



Small shrubs: evergreen or de- 

 ciduous. Twigs moderate, rounded 

 or somewhat 4-sided: pith small, 

 roundish, continuous. Buds ses- 

 sile, usually solitary but some- 

 times superposed or collaterally 

 branched, ovoid, with 4 or some 

 half-dozen exposed scales. Leaf- 

 scars opposite or the pairs widely 

 separated in 4 ranks, crescent- 

 shaped, small, exceptionally ele- 

 vated: bundle-trace 1: stipule- 

 scars lacking. 



Winter-character references: 

 Daphne alpinum. Schneider, f. 118, 

 D. Mezereum. Bosemann, 75; 

 Schneider, f. 118; Willkomm, 29, 

 f. 36; Zuccarini, 26, pi. 14. 



A peculiar white-dotting of the 

 lower surface of the leaf in some 

 of the species is shown to be 

 caused by groups of granular cells surrounding the stomata. 



1. Leaf -scars raised: twigs pubescent. (1). D. Genkwa. 

 Leaf -scars low: twigs glabrate, or habit low. 2. 



2. Deciduous. 3. 

 Evergreen. 5. 



3. Twigs staring pubescent and glandular. 

 Twigs glabrate. 4. 



4. Twigs buff-olive. 

 Twigs red, quite glabrous. 



5. Leaves large (2x8 cm.): bushy. 



(2). D. alpina. 



D. Mezereum. 

 D. altaica. 

 D. Laureola. 

 Leaves small (.5X2 cm.): spreading or prostrate. 6. 

 6. Glabrous: somewhat bushy. D. Blagayana. 



Twigs crisp-puberulent: trailing. (3). D. Cneorum. 



