l8o CALIFORNIA ACADEMY OF SCIENCES. 



3. Ceanothus sanguineus Pursh. C . Oreganiis* 



CEANOTHUS sanguineus, foliis obovatis, serratis subtus pubescentibus, 

 panicnlis axillaribns thyrsoideis brevissiine pedunculatis, pedicellis ag- 

 gregatis. — Near the Kocky Mountains, on the banks of the Missouri. 

 Leiuis. ''^ . May, June, v.s. in Herb. Lewis. Branches blood-red or purple; 

 panicles not longer than the leaves.— Pursh. Fl. Am. Sept. i, 167, (1814). 



4. Ceanothus microphyllus Michx. C. serpyllifo- 



Ceanothus microphyllus; subdecumbens, glabriuscuh;s, foliis i^erpusillis, 

 passim fasciculatis, obovalibus oblongisve, integriusculis: corymbulis 

 ramiilorum terminalibus. Obs. Radix, uti prfecedentis, crassiiis tuberosa, 

 rubra. Hab. in herbosis sabulosis sylvarum Georgi;© et Florida^ — Mich- 

 aux, Fl. Bor-Am., i, 154 (1803). 



C. ovatiis and C . sanguineus appear to me to be only 

 forms of C. A^ne^'icanus, which, even including them, 

 would have a much smaller range of variation than C . 

 thyrsiforus, which as compared with C. Americanus, has 

 a quite restricted distribution. C. serpyllifolms differs 



* C. Ore^rt/i!<s (Nutt.! mss.): "leaves broadly ovale, subcordate, mostly 

 obtuse, serrate, membranaceous, somewhat pubescent beneath [3-ribbed 

 from the base]; thyrsoid coi'ymbs in lateral panicles; fruit small, globose, 

 obti;sely 3-lobed, without pulp. C. sanguineus, Hook.! Fl. Bor.-Am. i.p. 

 125, not of Pursh." Woods of the Oregon from the Blue Mountains to the 

 Sea, Douglas, Nuttall ! Fort Vancouver, Dr. Scolder! — A shrub 4-12 feet 

 high; the stem and branches glabrous, reddish. Young leaves nearly 

 obovate; the adult ones narrow at the summit but scarcely acute, 1^-2^ 

 inches long, 1-1^ inch wide, thin; veins moderately prominent. Panicles 

 large, many-fliowered, about 3 inches long, the lower divisions compound. 

 Flowers larger than in C. Americanus, white. Fruit smaller than a jDeper- 

 coru. — ^Very distinct from the preceding \_C. sanguineus'] according to Nutt- 

 all.— Torr. & Gray, Fl. N. Am. i, 265, (1838). 



t G. Serpi/llifolius. Decumbent and sujBfruticose; branches filiform; leaves 

 small, ellii^tic-ovate, serrulate, obtuse, petioles and nerves on the under 

 side strigose; panicles pedicellate, axillary few-flowered; flowers conglom- 

 erated. Hab. Around the town of St. Mary's, in Florida. — Dr.Baldwyn. 

 By much the smallest s^jecies of the genus. Leaves and stems not much 

 exceeding those of Thyme, early leaves somewhat crowded, oval, or 

 roundish, succeeding leaves distant, all obtuse and nearly smooth; flowers 

 white, iJartly capitulate at the summit of a pedicell, 1 and a half to 2 

 inches long, only aboi;t from 12 to 15 together. — Nutt., Gen., i, 154(1818). 



