CEANOTHUS 317 



Spread over the whole length of California in a wild state, this species is, 

 in some parts, little better than a pest. A Californian writer (Mr G. Hansen) 

 observes that " it clothes hillsides for miles and miles, and gives them a greyish 

 green tint. Wherever man has done any cultivating, cleared an old wood 

 road, cut a trail, ploughed a furrow in years past, or still keeps cultivating, this 

 Ceanothus follows him like a nettle or chickweed." For gardens it has little to 

 recommend it, except that it is one of the hardiest species, and flowers freely 

 during May. 



C. DENTATUS, Torrey and Gray. 



This evergreen shrub, one of the most popular of the Ceanothuses in 

 gardens, is by some authorities regarded as a variety merely of C. papillosus. 

 The leaves are much smaller, usually ^ to i in. long, obovate or oval, the 

 margins decurved and set with gland-tipped teeth ; the upper surface is dark 

 shiny green, and rather resinous ; the under-surface covered with a close grey 

 felt ; venation pinnate. Flowers of a bright blue, in roundish clusters. P'rom 

 C. papillosus it differs most markedly in the absence of the warty excrescences 

 to which that species owes its name, but there are intermediate forms, and 

 one may occasionally find a leaf of C. dentatus showing traces of papillae. 

 C. dentatus occurs wild in the same region as C. papillosus (q.v.\ namely, the 

 Santa Cruz Mountains of California. A charming wall plant, and in the milder 

 counties hardy i.rthe open ground. Leaves alternate ; branchlets round. 



C. DIVARICATU?, Nuttall. 



Ar. evergreen shrub, with round, spreading, sometimes spinose branchlets. 

 Leaves alternate, ovate or oval, | to I in. long ; three-veined, downy beneath, 

 especially on the veins ; margins glandular toothed. Flowers light blue or 

 almost white, in slender panicles i to 4 ins. long. 



Native of S. California. It is, perhaps, doubtful if this species be at present 

 in cultivation, the plant generally cultivated under the name being one of the 

 several forms of C. thyrsiflorus. The true plant is distinguishable by its dull 

 leaves, its round, occasionally spinose branches, and its resinous fruits. It is 

 not so ornamental a shrub as thyrsiflorus, and amongst cultivated species is 

 most nearly related to C. Fendleri. 



C. FENDLERT, A. Gray. 



A twiggy, deciduous shrub, 4 to 6 ft. high ; with round, downy, spinose 

 branchlets. Leaves alternate, linear-lanceolate to ovate, I in. or less long ; 

 three-veined, short-stalked, downy especially beneath ; glandular-toothed 

 towards the apex, or entire ; of a dull grey green. Flowers bluish white, in a 

 cluster of umbels or fascicles at the end of the twigs, each cluster | to f in. 

 across. 



Native of the Rocky Mountains, from Colorado and New Mexico to 

 Arizona, up to 8000 ft. altitude. This Ceanothus withstood the winter of 

 1908-9 better than any other West American species, but it is one of the 

 least showy, its foliage being dull and its flowers of an indeterminate hue. 

 Introduced about 1898. 



C. INTEGERRIMUS, Hooker and Amott. DEER BUSH. 

 (Bot. Mag., 1/7640.) 



A deciduous or sub-evergreen shrub, 10 ft. or more high, with roundish, 

 rather erect, slender branchlets, downy when young, soon becoming smooth. 



