STUDIES IN CEANOTHUS. I9I 



snows of winter. The glabrous form is not deserving of 

 varietal rank, and so far as they have come under my 

 notice the specimens distributed under the varietal name 

 do not agree with description; the only truly glabrous 

 form I have seen grows in Napa County. No. i, Don- 

 ner, Placer County; No. 2, Mt. Shasta; No. 3 (glabrous 

 form), Mt. St. Helena, Napa County. The common hy- 

 brid, and the only one known to me in which this species 

 is concerned is No. 9 from Donner, Placer County, men- 

 tioned on a preceding page under C. cordtilaftis. 



12. Ceanothus thyrsiflorus Esch. C. elegans* 

 Lem. 111. Hort. vii (i860) t. 268. C. hicolor Raf. New 

 Flora, part iii, 57 (1856)!. 



Ceanothus thyrsiflora. C. foliis ovaiibus trinervibus serriilatis gla- 

 bris, caule multangulari, paniculis tliyrsoideis in ramis axillaribus. In 

 noTa9 Californias fruticetis. Fn;tex biorgyalis. Caulis strictus multau- 

 gularis glaber, iu augulis gramilatus, fnscus. Folia sparsa conferta, brev- 

 iter laetiolata, pollicaria ovalia, plerumque obtusa, raro acuta, submucro- 

 nato serrulata, trinervia glabra, iu nervis et venis panim pilosa. Stipulaj 

 triaugulares aciimiuatas deciduaj. lufloresceutia pauicula thyrsoidea in 

 ramis axillaribus, paniculse qxiatuor aut qninque cuuctas cyiuan in caulis 

 apice formant. Flores ante authesin bracteis ovatis acutis ciuereo tomen- 

 tosis caducis tecti. Calix urceolaris coeruleus. Petala ovata alba. — 

 Eschsch. in Mem. Acad. Petersb., ser. vi, x, 285 (1826). 



The range of this species is quite restricted. It is con- 

 fined to a narrow strip along the coast from the northern 

 border of California to the Santa Lucia Mountains in 

 Monterey County and never occurs more than a few miles 

 from the coast. In fact it is strictly confined to the red- 

 wood belt. Of all the species it has the greatest range of 

 unquestioned variation, both in size and in the form and 

 texture of the leaves. It is commonly a rather tall shrub 



*I have not seen the descriiJtiou. 



t Applied by Eafiuesque to G. thyrsiflorus " since all the sp. are thyrsi- 

 flore." 



