294 COMPOSITE. (COMPOSITE FAMILY.) 



7. S. lugens, Richards. Like the last ; leaves usually repand- or callous- 

 denticulate ; heads usually smaller, with mostly black-tipped scales. Subarc. 

 Amer. to New Mex., in the mountains ; reported from Minn, and N. Iowa. 



* * * Root perennial ; heads large and often solitary. 



8. S. Psetldo-Arnica, Less. Loosely white-woolly, sometimes becom- 

 ing glabrous ; stem stout, 6-12' high, leafy to the top ; leaves oblong, repand, 

 tapering into a narrow petiole-like base ; heads 1-4, over an inch in diameter ; 

 rays 20 or more, large. Grand Marian Island, off Maine (Prof. Verrill), to 

 Lab., and northward. 



76. C AC ALT A, L. INDIAN PLANTAIN. 



Heads 5 - many-flowered ; the flowers all tubular and perfect. Involucral 

 scales in a single row, erect-connivent, with a few bractlets at the base. Recep- 

 tacle naked. Corolla deeply 5-cleft. Achenes oblong, smooth ; pappus of 

 numerous soft capillary bristles. Smooth and tall perennial herbs, with alter- 

 nate often petioled leaves, and rather large heads, in flat corymbs. Flowers 

 white or whitish. (An ancient name, of uncertain meaning.) 



* Involucre 25 - 30-JJoivered , with several bracts at its base; receptacle flat. 



1. C. SUav6olen.S, L. Stem grooved (3-5 high); leaves frianqnlar- 

 lanceolate, halberd-shaped, pointed, serrate, those of the stem on winged pet- 

 ioles. Rich woods, Conn, to Mich., Iowa, and southward; rare. Sept. 



* * Involucre 5-leaved and ^-flowered, its bracts minute or none ; receptacle bear- 

 ing a more or lest evident scale-like pointed appendage in the centre.. 



2. C. reniformis, Muhl. (GREAT INDIAN PLANTAIN.) Not glaucous; 

 stem (4-9 high) grooved and angled; leares green both sides, dilated fnn- 

 a/Kiju'd, or the lows! kidney-form (1-2 broad), repand-toothed and angled, 

 pulmately veined, petioled ; the teeth pointed; corymbs large. Rich damp 

 woods, N. J. to 111., Minn., and southward along the mountains. Aug. 



3. C. atriplicifolia, L. (PALE INDIAN P.) Glaucous; stem terete 

 (3 - 6 high) ; leaves palmately veined and anrjiilate-lobed, the lower triangular- 

 kidney-form or slightly heart-shaped, the upper rhomb< >id or \vedge-form, toothed. 

 Rich woodlands, western N. Y. to Wise., Minn., and southward. Aug. 



4. C. tuber6sa, Nutt. (TUBEROUS INDIAN P.) Stem angled and grooved 

 (2-6 high), from a thick or tuberous root; leaves green both sides, thick, 

 strongly 5 - 1-nerved ; the lower lance-orate or oral, nearly entire, tapering into 

 long petioles ; the upper on short margined petioles, sometimes toothed at the 

 apex. Wet prairies, etc., Ohio to Wise., Minn., and southward. June. 



77. ERECHTITES, Raf. FIREWEED. 



Heads many-flowered; the flowers all tubular and fertile; the marginal pis- 

 tillate, with a slender corolla. Scales of the cylindrical involucre in a single 

 row, linear, acute, with a few small bractlets at the base. Receptacle naked. 

 Acheues oblong, tapering at the end ; pappus copious, of very fine and white 

 soft hairs. Erect and coarse annuals, of rank smell, with alternate simple 

 leaves, and paniculate-corymbed heads of whitish flowers. (The ancient name 

 of some species of Groundsel, probably called after Erechtheus.) 



