K)j DAVENPORT ACADEMY OF NATURAL SCIENCES. 



soid inflorescence in every shade of color from pure white to faded or 

 bright blue. In passing to a higher elevation the flowering period was 

 correspondingly delayed, so that even in a short day's journey the 

 plant could be seen in every stage of growth, from bud to forming 

 fruit. The tendency was also manifest to assume smaller forms at the 

 higher points, thus corresponding to the variety parvifolius, Watson. 

 It may also here be noted that even the entire leaved character is not 

 constant, as vigorous shoots show not infrequently irregular serratures. 

 In the same connection it may also be stated that seedlings of other 

 entire leaved species are deeply and sharply serrate. But these obser- 

 vations, important for the time being, became secondary in interest to 

 the study of another species on the rocky slopes of the Upper Sacra- 

 mento, which could not properly be referred to any described form. 

 Copious notes and collections then made confirmed this view, and sub- 

 sequently the same species turned up in collections made by Mr. and 

 Mrs. Lemmon in Plumas County the present season. Professor Lem- 

 mon, in sending specimens with accompanying notes in a letter, stated 

 that he had collected the same as early as 1874. It was then passed 

 over hastily at Cambridge as a mountain variety of C. thyrsiflorus. 

 Mr. Lemmon, not satisfied with this determination, re-collected and 

 examined more carefully oh his recent trip to the Sierras, and, our views 

 coinciding on its specific character, with his consent I take pleasure in 

 commemorating a long and pleasant botanical association by naming as 

 Ceanothus Lemmoni, n. sp. : 



Two feet high or less, spreading with rigid branches, bark lightish 

 gray, more or less hairy pubescent on the younger stems; leaves nar- 

 rowly elliptic to oval, 10 to 25 mm. in length, smooth above, ciliate 

 pubescent on the veins beneath, glandular-serrate, the serration most 

 distinct on young, vigorous shoots; stipules somewhat rigid; inflores- 

 cence short on prolonged leafy peduncles, flowers of a bright or faded 

 blue color; fruit 4 mm. broad, conspicuously crested. 



Habitat: — Johnson's Ranch, near Quincy, Plumas County, Lemmon, 

 1874 — May 30, 1889. Rocky slopes of the Upper Sacramento Valley, 

 1888-89, C. C. Parry. 



In herbarium specimens this species has probably been heretofore 

 referred to C. procumbens, Watson, from which it differs essentially in 

 its rigid habit, its less expanded foliage, and different form of fruit. 

 On the ordinary travelled route to the Yosemite, where C. procumbens 

 is conspicuous, spreading over the ground a soft carpet of verdure, the 



