DOGWOOD FAMILY 



679 



delta region of the Great Valley; Coast Ranges from Siskiyou Co. to San Luis 

 Obispo Co. ; coastal Southern California. May-June. 



Biol. note. — Along the canon bottom of Saratoga Creek in Santa Clara Co. (where observed 

 in August, 1912), Cornus glabrata grows in abundance, forming considerable thickets of a sort 

 typical of this species. The larger individuals become 15 to 22 feet high; the unbranched trunks 

 are slender and 8 to 12 feet high ; the diameter up and down the trunk is about the same through- 

 out and averages 2^4 inches. Such tall stems bear rather narrow crowns whose branchlets usually 

 have a tendency to droop. Sometimes the drooping branchlets become very long and cord-like 

 and occasionally reach the ground and take root. Those 

 which are properly spoken of as pendulous have very 

 few and very short branchlets. One pendulous cord 

 measures 16 feet 7 inches in length, about 3 or 4 feet 

 of it trailing on the ground. Similar observations have 

 been made in the Sierra Nevada: in the foothills near 

 Dunlap, Ealph Hopping reports Cornus glabrata shrubs 

 as developing cord-like branchlets which root where 

 they strike the soil. 



The ordinary foliage leaves of the flowering 

 branches are on the whole fairly uniform in size and 

 shape. From these the leaves of typical sterile shoots 

 differ somewhat markedly; their blades are usually 

 elliptic (and abruptly acute), sometimes suborbicular. 

 The axillary winter buds of sterile shoots, formed from 

 August to October, are slender and about 1^ to 2 lines 

 long. Such elongated buds do not usually appear in 

 the leaf axils of the flowering branchlets. In the Los 

 Buellis Hills near Milpitas, E. J. Smith notes that the 

 green stage of the drupe is succeeded by a white or 

 milk-color stage; this color becomes tinged with blue, 

 or later becomes fully light blue, then fades to white 

 again where there is full insolation. 



Locs. — Sierra Nevada: Delta, Shasta Co., Jepson 

 6181; Cool, Placer Co., A. R. Valentien; Sweetwater 

 Creek, Eldorado Co., K. Brandegee ; Columbia, Tuol- 

 umne Co., Jepson 6343; Dorst Creek, Tulare Co., W. 

 Fry. Delta region of the Great Valley : Walnut Grove, 

 Grand Isl., Jepson 14,382. Coast Eanges : Yreka Creek, 

 Butler 89; Cecilville, South Fork Salmon River, Jep- 

 son; Rattlesnake Creek, Trinity Co., Tracy 6488; Hay 

 Fork Valley, Trinity Co., Tracy 6476 ; Eound Valley, 

 ne. Mendocino Co., Goddard 615; Long Valley, Mendocino Co., Jepson 1869a; Sherwood Valley, 

 Mendocino Co., Jepson 2194; betw. Potter Valley and Mt. Sanhedrin, Jepson 14,152; Middle 

 Creek, foot of Elk Mt., n. Lake Co., Jepson 14,322; Scott Valley, Lake Co., Jepson; Alexander 

 Valley, Sonoma Co., Jepson 9488 ; Pope Creek, Napa Co., Jepson 14,151; Wooden Valley, e. Napa 

 Co., Jepson 14,149; Wild Horse Canon, nw. Solano Co., Jepson 2451b; Green Valley, w. Solano 

 Co., Jepson 1740 ; Pine Canon, Mt. Diablo, Jepson 14,150 ; Los Buellis Hills, Santa Clara Co., 

 B. J. Smith; upper Nacimiento Eiver, Monterey Co., Jepson 1694 ; Stone Canon, se. Monterey Co., 

 Gondii; Estrella, San Luis Obispo Co., Jared; Pozo, se. San Luis Obispo Co., Eastwood. Coastal 

 S. Cal.: Alamo Peak, Ventura Co., Dudley 4- Lamb 4652; Banning Canon, Santa Catalina Isl., 

 Jepson 3046 ; Hemet Valley, San Jacinto Mts., Muns 5086. 



Refs.— Cornus glabrata Benth. Bot. Sulph. 18 (1844), type loc. "San Francisco", Hinds; 

 Jepson, Fl. W. Mid. Cal. 361 (1901), ed. 2, 305 (1911), Man. 733, fig. 716 (1925). Svida cata- 

 linensis Millsp. Field Mus. Publ. Bot. 5:189 (1923), type loc. Santa Catalina Isl., Polley. 



Cornus costulata Jepson, Fl. W, Mid. Cal. ed. 2, 306 (1911), type loc. Round VaUey, ne. Men- 

 docino Co., Goddard; stone with 8 filiform longitudinal ridges. 



4. C. sessilis Torr. Miners Dogwood. (Fig. 278.) Clumpy shrubs or small 

 trees, 5 to 9 (or 13) feet high; leaf -blades obovatish, acute, 2 to 31/2 inches long, 

 shortly petioled ; flowers yellowish, in small sessile umbellate clusters subtended by 

 4 small caducous bracts ; pedicels 2 to 3 lines long ; drupe oblong, at first greenish- 

 white, then yellow, then red, maturing purple-black, shining, 5 to 6 lines long, on 

 a pedicel as long. 



Stream banks in the hills, commonly forming thickets, 1800 to 3600 feet : Sierra 

 Nevada foothills from Amador Co. to Siskiyou Co. ; Trinity and Humboldt Cos. 

 Apr. 



Fig. 278. Cornus sessilis Torr. a, 

 f r. branch, X % ; b, fl. branch, X 1/2 ; 

 c, fl., X 4. 



