!I4 COMPOSITAE. 



CACALIA Xi. 1.1WAX Plantain. Tall perennials, with alternate leaves, 

 and discoid beads in flat corymbs. Flowers white or whitish, all tubular; 

 corolla deeply .i-cleft. Involucre eylindric, the scales in oue row, erect-eon- 

 nivent, with a few braetlets at the base. Pappus of capillary bristles. 



* Heads 25-30-flowcred. 



C. suaveolens L. Sterr. 3—5 feet high, glabrous, grooved; leaves triangu- 

 lar-lanceolate, halberd-shaped, acuminate, serrate, wing-petioled. Woods; 

 August-September; infrequent; Winneshiek, Fayette, anil Muscatine coun- 

 ties; reported from Jackson and Scott counties. (Sj//i'wma numicuUsns (L.) 

 Raf.) 



* * Bcudx yjluwcrctl; involucre of -5 settle*. 



C. reniformis Muhl. Stem 3-8 feet high, angulate, grooved, Dot glaucous. 

 leaves green on both sides, lower leaves reniform, very large, long-petioled, 

 upper dilated fan-sbaped, toothed and angled, palmately-veined. petioled. 

 Rich woods; July-September; infrequent; Winneshiek, Allamakee, and John- 

 son counties; reported from Fayette county. (Mesadaniti reniformis (.Muhl.) 

 Eaf.) 



C. atriplicifolia L. Stem terete: •'>-."> feet high, grooved, glaucous; leaves 

 palmately-veined and angulately-lobed, toothed, petioled, glaucous beneath: 

 lower triangular-reniform, or slightly cordate. Rich woods; August-Septem- 

 ber; frequent; Muscatine. Johnson, Jefferson. Henry, Des Moines, Van 

 Kuren, Djcatur, Union, Ringgold, Taylor. Page. Fremont, and Pottawat- 

 tamie counties. [Mexudenut atrlpliclfolLi (L ) Raf.) 



C. tuberosa Nutt. Stem grooved and angled, 2-ti feet high, glabrous, 

 from a tuberous root; leaves ,oval or oblong, entire or obscurely toothe I, 

 thick, r>-T-nerved; lower with long petioles, upper with short margined 

 petioles. Wet prairies; June-August; frequent: Allamakee. Fayette, John- 

 son, Appanoose, Decatur, Union, Adams, Ringgold. Taylor. Page. Pottawat- 

 tamie, Shelby, Hancock, Winnebago, Oerro Gordo. Dallas. Webster, and 

 Emmet counties; reported from Scott, Story, and Woodbury counties. 

 [M&uHh'Htti tulicroxtt (Nutt.) Britton). 



ERECHTTTES Raf. Ill-scented annuals, with alternate simple leaves, and 

 paniculate-corymbed discoid heads of whitish flowers. Involucre cylindrical, 

 of linear scales, in one row, with a few braetlets at the base. Flowers many, 

 all tubular, fertile, the marginal pistillate, the central perfect. Pappus of 

 soft capillary bristles. 



E. hieracifolia (L.) Raf. Fireivced. Stem grooved, t-l feet high, often 

 hairy; leaves lanceolate, or oblong, acute, unequally toothed, sessile, upper 

 auricled. Rich open woods and burnt clearings; August-September; fre- 

 quent; Winneshiek, Johnson, Des Moines, Lee. Decatur, and Calhoun coun- 

 ties; reported from Fayette and Story counties. 



ARCTIUM L. Miennial herbs, with large petioled alternate leaves, and 

 solitary or clustered discoid heads. Involueral scales numerous, imbricated, 

 long-attenuated, with hooked tips. Heads globo.se. many-flowered; flowers 

 tubular, perfect. Receptacle bristly. Pappus of numerous, rough, deciduous 

 bristles. Achenes oblong, flattened.. 



A. minus Schk. Burdock. Stem 2-4 feet high, branched: leaves thin, 

 broadly ovate, with a cordate base, or lanceolate with a cuneate base, smooth 

 above, pale-canescent beneath; heads many, racemose on the branches, short- 

 peduncled or sessile, about half an inch broad, inuer bracts not exceeding 1 the 



