94- COMPOSITiE. Tushilago. 



of the corolla campanulate, 5-toothed), staminate. Scales of the involucre 

 oblong, obtuse, somewhat, in a single series. Receptacle naked. Anthers 

 scarcely caudate. Style abortive in the flowers of the disk ; in those of the 

 ray 2-cleft, the branches somewhat terete. Achenia of the ray somewhat 

 cylindrical-oblong, glabrous; in the disk abortive. Pappus of the ray- 

 flowers in many series, of the disk in a single series, capillary. — A perennial 

 herb, common throughout Europe and Asia, and sparingly naturalized in the 

 nortliern portions of the United States. Rhizoma rather thick, horizontal. 

 Leaves radical, appearing later than the flowers, cordate, angled or toothed, 

 petioled. Scape clothed with scaly bracts, tomentose, bearing a single head- 

 Flowers yellow. — ColC s-foot. 



T. Farfara (Linn.)— FZ. Dan. t. 595 ; Engl. hot. t. 429 ; WilUl.! spec. 

 3. p. 1967 ,- DC. ! prodr. 5. /;. 208 ; Beck, hot. p. 200. 



Wet places and low meadows in cultivated grounds ; introduced from 

 Europe. March-April.— The ColVs-foot, a well known article of the popu- 

 lar materia medica, although not enumerated by any American writer, ex- 

 cept Prof. Beck, is perfectly naturalized in many parts of the Northern States, 

 in moist grounds ; where it sometimes becomes a troublesome weed. 



21. ADENOCAULON. HooTc. hot. misc. 1. p. 19, t. 15, &; jl. Bor.-Am. 

 1. p. 308 ; DC. prodr. 5. p. 207. 



Heads 5-10-flowered, heterogamous ; the flowers all tubular and equal : 

 those of the ray 5, in a single series, pistillate ; of the disk 4-5, staminate. 

 Corolla 4-5-lobed. Scales of the involucre several, in a single series, re- 

 flexed in fruit. Receptacle naked. Achenia obovate-oblong or clavate, 

 bearing towards the summit numerous large stipitate glands. Pappus none. 



Perennial (N. American & Chilian) herbs. Stem leafy towards the base, 



naked and paniculate above, clothed with a somewhat deciduous tomentose 

 pubescence, glandular towards the summit. Leaves alternate, pinnately or 

 palmately veined, membranaceous, petioled, glabrous above, tomentose and 

 canescent beneath. Heads few, small, loosely paniculate. Flowers ap- 

 parently white. 



1. A. hicolor (Hook. ! 1. c.) : leaves deltoid, mostly cordate, angularly 

 toothed or sinuate, somewhat decurrent on the petiole. — DC prodr. 5. 2^- 207. 



(3. integrifolium : leaves smaller, deltoid-ovate or slightly cordate, ob- 

 scurely angulate-toothed or entire. — A. integrifolium, Nult. ! in trans. Amer. 

 phii. soc. (n. ser.) 7. p. 289. 



Dense woods, Oregon, from Fort Vancouver, &c. Dr. Scouler ! Nuttall ! 

 to the Rocky Mountains in lat. 52°, Drummond ! Near the outlet of Lake 

 Superior, Dr. Pitcher! June. — Stem 10-30 inches high, slender. Leaves 

 2-4 inches long, and usually about the same breadth at the base, densely 

 tomentose beneath with a close white arachnoid pubescence. Anthers sagit- 

 tate, acuminate, sterile and nearly unconnected in the fertile flowers. Style 

 entire in the sterile flowers, in the fertile with two short obtuse lobes. — The 

 var. /3. appears to pass insensibly into the ordinary larger form ; the toothing 

 of the leaves is very inconstant. 



