CORNUS 159 



e. Pith of 1-2-year old twigs 

 brown or drab (rarely white 

 in C . drummondii) 



f. Branchlets gray 5. C. drummondii 



f. Branchlets red or 

 purplish 



g. Leaves broadly 

 / rounded at base 6.C. amomum 



g. Leaves tapered 



at base 7.C. obliqua 



d. Cyme -vestiges paniculate 

 (not racemose, as the Latin 

 name indicates) 8.C. racemosa 



b. Leaf-scars alternate (but crowded 

 near the ends of the twigs, appear- 

 ing as if whorled) 9.C. alternifolia 



1. _C. canadensis L. Dwarf Cornel . Bunchberry. Almost 

 herbaceous, but woody at the base; flowering stem from a near- 

 ly horizontal rootstock, erect, 9-22 cm. high; drupes red, globular, 

 present in winter. Woods and openings, Greenland to Alaska, south 

 to West Virginia, Illinois, Minnesota, South Dakota, New Mexico, 

 and California (Fig. 231). 



2. _C. florida L. Flowering Dogwood. A shrub or small tree 

 up to 12 m. high with grayish-brown "alligator" bark; twigs green 

 or purple, glabrous; drupes ellipsoid, 1 cm. long, red (rarely 

 yellow), persistent in winter. Acid woods, Florida to Texas and 

 Mexico, north to Maine, Ontario, Missouri, and Kansas (Fig. 232). 



3. C. stolonifera Michx. Red-Osier Dogwood. Erect shrub to 

 2.5 m, high, with some prostrate stoloniferous stems; branching 

 loose and osier-like; twigs dark blood-red, glabrescent; pith white. 

 Thickets, Newfoundland to Yukon, south to West Virginia, Iowa, 

 Nebraska, New Mexico, Arizona, and California (Fig. 233). 



4. C. rugosa Lam. Round -le at Dogwood . (C. circinata L'Her. ). 

 Shrub 2-3 m. high, the branching rather loose;' twigs green, 

 becoming rather pink, bearing closely appressed pubescence ;pith 

 white; buds nearly sessile, hairy at the tip. Dry woods, Quebec 



to Manitoba, south to West Virginia, Illinois, and Iowa (Fig. 234). 



5. C. drummondii Meyer. Roughleaf Dogwood. (C. asperi- 

 folia M ichx. ). Upright shrub or small tree up to 5 m. high; bran- 



