240 



ClSTACEAE. 



HUDSONIA. 



(Family Cistaceae). 



Low tufted villous shrubs of 

 dry regions: evergreen. Twigs 

 very slender, terete: pith very 

 minute. Buds scarcely evident 

 except as short branches, without 

 differentiated scales. Leaf-scars 

 lacking, the long-persistent leaves 

 finally falling with the outer cor- 

 tex. Leaves very small, alternate, 

 narrow and pointed, much longer 

 than the internodes: stipules 

 lacking. Capsules, if present, 

 narrow, scarcely surpassing the 

 sepals. 



Hudsonia scarcely possesses 

 horticultural merit, but it attracts 

 attention when it is found grow- 

 ing wild. 



1. Leaves short (2 mm.), appressed. (1). H. tomentosa. 

 Leaves larger (3-6 mm.): fruit distinctly stalked. 2. 



2. Leaves moderate, rather gray, ascending. (2). H. ericoides. 

 Leaves long, more spreading, green. (3). H. montana. 



Winter-characters are given for the related genus Helian- 

 themum as follows: H. amabile. Schneider, f. 119. H. oe- 

 landicum. Bosemann, 35. H. vulgare. Bosemann, 35. 



