STUDIES IN CEANOTHUS. 185 



B. Leaves -persistent. 



a. Spinosi. Branches mostly divaricate often spinose, 

 leaves i- or ^-nerved coriaceous, usually entire and 

 sparingly glandular. Flozvers commonly white or 

 pale. 



6. Ceanothus spinosus Nutt. 



C. spinosus (T!ivLtt.l mss.): "glabrous; branches thorny; leaves cuneate- 

 oblong, or oblong, obtuse or emarginate, lucid, entire or obscurely glandu- 

 larly serrulate towards the apex (1-ribbed, pinnately veined]; flowering 

 branchlets divaricate, leafy; thyrsus oblong; ovary subglobose without 

 protuberances. Mountains of St. Barbara. — A straggling shrub. Leaves 

 somewhat coriaceous, obsiirely veined, pubescent beneath in the young 

 state, 8-10 lines long." Flowers white or blue; pedicels 2-3 lines long. 

 Nuttall. — Nearly allied to the preceding species. There is a pair of ob- 

 scure nerves from the base of the leaf; but they are scarcely as large as 

 the veins which proceed from each side of the mid-rib. — Torr. & Gray, 

 Fl. N. Am. i, 267 (18.38). 



Var. Palmeri (Trel.) C. divaricatus var. grosscserra- 

 tus* C. divaricatus var. eglandulosus,\ C. eglandulosus.X 



C. Palmeri, n. sp. Glabroiis throughout, or a very few hairs on the 

 leaves and petioles: branches greenish, becoming brown: leaves mostly on 

 short spurs, slender-petioled, about 40 mm. long, elliptical or ovate- 

 oblong, rounded at both ends, mucronate or emarginate, entire, thinner, 

 than in the last (C. sp'mosun) [not at all 3-nerved: fruit 5 to 6 mm. in 

 diameter] : flowering branches ascending, naked or few-leaved : inflorescence 

 oblong, nearly simple: exocarp of fruit rather fleshy. — Mountains of 



* Ceanothus divaricatus, var. ? gkosse-serratus: foliis majoribus, grosse- 

 serratus, acutiusculis. Station not recoz-ded. Branches thorny at the 

 extremities; serratures of the leaves aciite; flowers blue — Torr. in Pac. E. 

 Kep. iv, 75. 



Weanothus divaricatus var. eglandclosus foliis integerrimis (margine uec 

 deuticulatis glanduliferis) obtiasissimis. On mountains near San Gabriel; 

 March 22. Also with vestiges of last year's fruit. Cohon Pass, 

 March 16. (Collected by Dr. Parry on the mountains east of San Diego; 

 in fruit and in flower bj' Mr. Wallace at Boca de Teyunga, April.) This 

 has the flowers, the divaricate spiuescent branches with whitish bark, and 

 also the foliage of C. divaricatus, except that none of the specimens show 

 a trace of the glandular deuticulations so manifest in the specimens of 



