2l6 CALIFORNIA ACADEMY OF SCIENCES. 



richest mazarine blue, arranged iudeecl in corijmhs, but so crowded aud so 

 spreading as to form dense balls or capHula, sessile, aud these crowded 

 about the extremities of the short branches, so copious as to conceal a 

 great part of the foliage. Pedicels reddish, hairy, and having small scale- 

 like, reddish deciduous bracts at the base. * * * California, Lobb. — 

 Hook, in Curtis Bot. Mag. Ixxx, No. 4806, Sept. 1 (1854). 



Hybrid of C . thyrsijiorHs and C . dentattis. 



Ceanothus Lobbianus; ramis patentibus teretibus, foliis elliptico-oblongis 

 tricostatis rigidis hirsutulis marginibus recurvis grosse glauduloso-den- 

 tatis, stipulis lato-subiilatis petioli longitudine, pedunculis subterminali- 

 bus nudis vel uuifoliatis, racemis cajDitatis subrotundo ovatis, floribus 

 deusis. — Descr. A moderatelj'-sized, erect shrub, with numerous i^atent 

 terete rather twiggy branches, the young ones green and downy. Leaves 

 patent, alternate, rarelj^ exceeding an inch in length, geuerallj' bearing 

 young leaf-shoots in the axils, on short petioles, elliptical oblong, obtuse, 

 rigid, subcoriaceous, slightly hairy, three-ribbed, dark green above, be- 

 neath paler and downy; the margin always recurved (in cultivated as well 

 as native specimens), and bearing uiimerous conspiciious spreading teeth, 

 tipped with a gland: ribs aud veins sunk above, prominent beneath. 

 There are two broad, subulate, scale-like sUpuIcs, one on each side the base 

 of the petiole, equal in length with it. Peduncles solitary, rather longer 

 than the leaves, subtermiual, situated in the axils of the tipper leaves, 

 terminated by a capitate raceme of dark blue, comi^act flowers. Pedkils 

 hairy. [Description of flowers omitted]. — Hook, in Curtis Bot. Mag., Oct. 



I, 1854, tab. 4811 — but description numbered 4810. 



Hybrid of C. thyrs/foriis and C. dciitat/is. 



II. Hybrids. i)i § Ccras/cs. 



The two following are h3'brids of C. cuncatus and C . 



prostratiis : 



Ceanothus connivens. A low shrub with elongated, nearly simple, weak 

 aud flexible trailing branches 3 feet long or more, forming a dejiressed 

 tuft: leaves opposite, coriaceous, cixneate-obovate to oblanceolate, an inch 

 long or less, entire except at the truncate or retuse and mostly .3-toothed 

 apex, glabrous and rugulose above, white-tomentulose between the veins 

 aud veinlets beneath: fruit in umbelliform clusters at the ends of short 

 terminal brauchlets, small, the cousijicuous horns closely appressed to 

 the surface of the exocarp, conniveut and overhqjjiing at the end of it. — 

 Calaveras Cotinty, Calif., in dry oak woods near the Half- Way House, be- 

 tween Murphj^'s aud the Big Trees, 19 June, 1889. As a new member of the 

 Cerastes section, exceediuglj' well marked in its fruit character, it has a 

 flexibility of stem found in no other nothern relative; although C. verru- 



