228 Amhrican Midland Naturalist Monograph No. 4 



2b. BuNCHBERRY Elder (Var. microbotrys (Rydb.) Kearn. Si Peebles). 

 — Shrubs 1 to 6 feet high with hght brown bark and smooth herbage; leaflets 

 5 to 7, light green, egg-shaped to broadly lance-shaped, long-pointed at the 

 tips, 1 to 4 inches long, the margins coarsely toothed; flowers yellowish-white, 

 borne in round-topped clusters about 2 inches across, the clusters becoming 

 larger and more spreading in fruit; berries bright red. (Syn. S. microbotrys 

 Rydb.). 



OcCUTTence. GRAND TETON. YELLOWSTONE, reported. ROCKY MOUNTAIN. GRAND 



CANYON, on the North Rim. 



3. Blackbead Elder (Sambucus melanocarpa Gray). — Spreading shrub 

 up to 10 or 12 feet high, with reddish-brown branches; leaflets dark green, 

 5 to 7, oblong-lance-shaped, 3i/2 to 6 inches long, long-pointed, coarsely 

 toothed, hairy below when young, becoming smooth; flowers yellowish-white, 

 borne in broadly egg-shaped clusters 2 to 3 inches across, about as broad 

 as high; berries black. 



Occurrence. — glacier, common, 3,100 to 5,000 feet: foot of Lake McDonald 

 Avalanche campground; Swiftcurrent Lake; Swiftcurrent valley; Cut Bank valley 

 Bovk'man Lake; Kintla Lake. YELLOWSTONE: east entrance; west of Tower Junction 

 Mount Washburn road. GRAND TETON, 7,300 feet: north of Bear Paw Lake. GRAND 

 CANYON: North Rim. Canyon on north side of the river. 



Sunflower Family (Compositae) 



Field Guide to the Genera 



A. Leaves divided into linear or filiform segments. 



Ray flowers present, yellow; herbage without sage odor. 



Bracts of involucre about 5, egg-shaped; flowers with pappus composed of sev- 

 eral papery scales ERIOPHYLLUM, p. 230. 



Bracts of involucre more than 5, linear; flowers with pappus of hair-like 

 bristles. 

 Involucre cylindnc, composed of a single series of equal erect bracts and 

 several shorter spreading bracts below; pappus abundant, soft, 



white - SENECIO, p. 230. 



Involucre hemispheric, composed of unequal bracts overlapping in several 



series; pappus scanty, brownish ....Aplopappus spinulosus var. p. 249. 



Ray flowers none; herbage with strong sage odor ARTEMISIA, p. 230. 



B. Leaves not d:vided, or if so, the lobes or segments never linear-filiform. 



Leaf-blades linear to narrowly oblong, spatula-shaped or wedge-shaped, not toothed, 

 or with 2 or 3 teeth at the tip only. 



Herbage with a strong sage odor ARTEMISIA, p. 230 



Herbage without sage odor. 



Bracts of seed-bearing involucres winged with broad silvery scales ; flowers 



greenish and inconspicuous HYMENOCLEA, p. 234. 



Bracts of involucres not changed in fruit; flowers yellow. 

 Involucre composed of 4 to 6 bracts. 



Herbage dark green, smooth, the leaves and bracts with dark, ill- 

 smelling oil glands POROPHYLLUM, p. 234. 



Herbage grayish-woolly, without ill-smelling oil glands 



tetradymia, p. 235. 



