DOGWOOD FAMILY. 361 



Leaves narrower, 1 to 2}i in. long; stone not channeled on the edges or 

 ohscurely so. 

 Stone little compressed ; leaves thin, narrowly obovate or oblong, green, 



and nearly alike on both faces 3. C. glabrata. 



Stone pointed at base, tubercled at apex; leaves mostly ovate-lanceolate, 

 purplish . .i.e. Torreyi. 



1. C. Nuttallii Aud. Nuttall's Dogwood. Tree, 10 to 15 ft. 

 high, with ascending or widely spreading branches and smooth hark; 

 leaves narrow- or elliptic-obovate or even orbicular, with rounded or 

 shortly acute apex, 3 to 5 in. long, on petioles 1 in. long or less; 

 flowers crowded on a thick convex receptacle and surrounded by a 

 conspicuous petal-like involucre; bracts or the involucre white, some- 

 times tinged with red, commonly 6, obovate to oblong, IJ to 3 in. 

 long, abruptly acute or acuminate; head ^ to 1 in. broad, very dense; 

 drupe 5 to 6 lines long, scarlet. 



Marin Co. and Napa Valley northward through the Coast Ranges 

 to Mt. Shasta, thence southward in the Sierra Nevada; rare in the 

 South Coast Eanges (Monterey Co., ace. to Bot. Cal., Santa Cruz 

 Mountains); San Diego Co. Plowers remarkably beautiful, appearing 

 with or before the leaves. 



C. Canadensis L. Btjnch-bekry. Herbaceous; stem 3 to 6 in. 

 high with a whorl of 6 leaves at summit, a pair of leaves above the 

 middle, and scales below; involucre also petal-like. — Mendocino Co. 

 and northward. C. sessilis Torr. Shrub 10 ft. high or more, with 

 yellowish flowers in sessile umbels subtended by 4 small caducous 

 bracts. — Northern Sierra Nevada. 



2. C. pubescens Nutt. var. Californica C. & E. Common 

 Dogwood. Shrub, 5 to 15 ft. high with smooth purplish branches 

 and branchlets; leaves commonly ovate, varying to elliptical, acute, 

 lighter colored and more pubescent, also conspicuously ribbed, beneath ; 

 cymes IJ to 2 in.. broad; petals oblong, acute, 2 lines long; style 

 glabrous, little or not at all thickened at apex; drupe white, sub- 

 globose, 3 lines in diameter; stone somewhat flattened, mostly 

 oblique, with furrowed edges, each side with 4 less obvious or 

 shallower channels. — (C. Californica C. A. Mey.) 



Common on stream-banks in the Coast. Kanges and Sierra Nevada, 

 especially in canons; also along the Sacramento and San Joaquin 

 Eivers. Flowering and fruiting from Apr. until Nov. or later. 

 Stone in shape and appearance very similar to the fruit of Ehus 

 diversiloba (Poison Oak) after the dry loose skin of the latter has 

 fallen. Winter buds linear-oblong. Shoots of the season often 1 to 

 2 ft. long. 



C. Geeenbi C. & E. (not of Greene, Man. 159, as to Napa Co. 

 plants). Leaves similar but rounder; style greenish at the thickened 

 apex; drupe said to be blue, but there is no record of an observation 

 of the fresh fruit; stone globose, not channeled or scarcely ridged._ — 

 Type specimens in the Herbarium of the University of California, 

 doubtless Californian but the particular locality unknown. 



3. C. glabrata Benth. Shrub, 5 to 12 ft. high, with gray bark, 

 and nearly or quite glabrous twigs; leaves narrowly obovate or 



