STUDIES IN CEANOTHUS. I97 



The forms of this species have been more troublesome 

 to botanists than even those of C . spmostis or C. integer- 

 rinms. C . divaricatiis answering to Nuttall's description 

 and fragmentary specimens, is not recognizable as a valid 

 species at the type locality. It is there represented by 

 many slightly differing forms, either variations of C . 

 hirsutus or hybrids of that species and C. sptnosns. 

 Under the name of C. divaricatiis in most herbaria there 

 are usually to be found C. spinosus var. Pahneri; C . 

 cordulatus, or the more rigid forms of C. sorediatus. 



C. sorediatus is merely the northward extension of C . 

 hirsutus, and C . intricatus is as its author came to know 

 ■only C . sorediatus in its smaller and more rigid growth. 



Var. HIRSUTUS (Nutt.) C . divaricatus* C. sorediatus,\ 



C. intricatus. % 



Geanothtis hirsuUis (Nutt. inss.): " Somewbat spiny and almost hirsute, 

 particularly the young branches; leaves cordate-ovate, glandularly ser- 



* Ceanothiis divaricaUis['^\xii A mss.): "Somewhat thorny, nearly glabrous; 

 leaves elliptical-oblong or oblong-ovate, lucid, somewhat obtuse, minutely 

 and glandularly serrulate, pubescent (particularly on the nerves) beneath; 

 flowering branches divaricate; leafy thyrsus interrupted; rather loose; 

 ovary sub-globose, without protuberances. Mountains of St. Barbara and 

 also near the town. April. — A straggling shrub. The abortive branchlets 

 at length become spinose. Leaves 8-12 lines long, somewhat coriaceous, 

 .S-nerved from the base, the lateral nerves obscure: petioles about 2 lines 

 long. Thyrsus oblong, with several remote fascicles in the axils of the 

 leaves. Flowers blue. Fruit about the size of a peper-corn. Nuttall. — 

 Torr. & Gray, Fl. N. Am., i, 266 (1838). 



Weanothus sorediatus; ramis teretibus resinoso-verriacosis, ramulis pateu- 

 tibus subsericeis, foliis elliptico-ovatis obtusis subcoriaceis minute glaud- 

 uloso-dentatis 3-costatis supra glabris subtus incano-pubescentibus ad 

 nervos sericeis, glomerulis multifloris deusis folio parum longioribus 

 (floribtis CcBruleis). — The short dense glomerules of flowers resemble those 

 of the first species [C. spinosus]; but these flowers are blue. The germen 

 too is without lobes. The branches are copiously studded with resinous 

 warts, in the more exposed parts of the stem, frequently forming large 

 patches."— H. & A. in Bot. Beech., 328 (1840). 



1 0. intricatus, n. up. Densely branched, younger shoots hirsutely 



