COMI'OSITAE (COMPOSITE FAMILY) 



821 



dm. high ; basal leaves from broadly obovate with rounded tips to oblanceolate 

 and acutish, disUnctly 3-nerved ; stem-leaves scattered, lanceolate, acuminate ; 

 heads loosely or densely corymbose ; bracts of the pistil- 

 late heads linear, purplish or green, with pale tips; styles 

 crimson. (A. plantaginea R. Br.) — Dry soil, s. Me. to 

 Minn., and southw. Apr.-June. 



= = Heads comparatively large, averaging 9 (8-10.5) 

 mm. high ; stems stoutish. 



a. Basal leaves mostly hroad-obovate or rhombic-obovate, 

 narroived from near the middle to the acutish or blunt 

 tip. 



4. A. fillax Greene. Stems 1-4 dm. high, sometimes 

 slightly glandular ; basal leaves large, the mature ones 

 2-5 cm. broad ; lower stem-leaves oblong- 

 lanceolate, rather crowded ; corymb 

 rather dense ; bracts of the pistillate 

 head attenuate to scarious tips or broad , 

 and somewliat petaloid ; styles pale, 

 sometimes crimson. (A. ambigens Fer- 

 nald.) — Rich open woods and fields, 

 centr. Me. to Minn., and southw. May, 

 June. Fig. 978. 



6. Basal leaves from spatulate to narrowly spatulate-obovate, 

 with rounded lips. 



5. A. occidentalis Greene. Stout ; the stem at first low, 

 becoming 2.5-4 dm. high ; basal leaves 1-2.5 cm. broad; stem- 

 leaves lanceolate to oblanceolate, rather conspicuous ; inflores- 979. a. occidentalis. 

 cence suboapitate ; bracts lanceolate to oblong, with conspicu- 

 ous white tips; styles crimson. {A. Farwellii Fernald, not Greene.) — Rich 

 open soil, e. Que. to Minn., s. to s. w. Me., s. N. H., w. Mass., N. Y., and III. 

 May, June. Fig. 979. 



.++ ++ Basal leaves small, 2-5 cm. long. {Nos. 10 and 11 with poorly developed 

 stolons might be sought here.) 



=-- Basal leaves spatulate, with little or no distinction of blade and petiole. 



6. A. rupicola Fernald. Stems slender, 1.5-3 dm. 

 high ; stolons very numerous and short, forming dense 

 mats; basal leaves mucronate, 1-4 cm. long; stem-leaves 

 numerous (10-18), linear-attenuate, the upper dark 

 green, strongly contrasting with the white-pubescent 

 stem ; corymb compact ; involucre of pistillate plant 8- 

 10 mm. high; bracts with conspicuous long yellowish- 

 white firm papery tips ; styles pale. — 

 Slaty ledges by the Mattawamkeag R . , 

 Me. June. Fig. 980. 



9S0. A. rupicola. 



= = Basal leaves with more distinct petioles and obovaie 

 blades. 



a. Stem bearing purplish glandular hairs; basal leaves 

 S-nerved. 



1. A. Brainfirdii Fernald. Stem slender, 2-3 dm. high; 

 basal leaves obovate or orbicular-obovate, 1-2 cm. broad; 9Sl. A. Brainerdii. 

 stem-leaves remote, small ; corymb rather loose ; involucre 

 6-8 mm. high ; bracts white-tipped, the outer blunt, the inner attenuate ; styles 

 crimson. — Rich meadows and open woods, s. Me., Vt., and e. N. Y. May, 

 June. Fig. 981. 



