COMPOSITE. 197 



** Pistillate flowers in one series. Achenia obcompressed, obovoid. 



5. G. supinum Vill. : cespitose ; flowering stems simple, slender, woolly 

 above ; leaves linear, woolly ; heads oblong, solitary, terminal, or few and 

 spicate-racemose ; scales of the involucre oblong, acuminate, brown ; ache- 

 nia puberulent. Omalotheca supina D. C. 



White mountains, N. H. Nutt. N. to Labrador. %. — .Stem 2 — 4 inches 

 high. Low Alpine Cud-weed. 



47. FILAGO. Toiirn.—Coiion Rose. 



(From the Latin_^ZMm, a thread ; in allu.<?ion to the cobweb-like threads which 

 cover the plant.) 



Heads many-flowered, lieterogamous ; the terminal or central 

 flowers numerous, pistillate, perfect or infertile, tubular, 4^ — 5- 

 toothed ; the others filiform, pistillate, scarcely-toothed. Scales 

 of the involucre few, the outer ones woolly. Receptacle elon- 

 gated, filiform, chaffy. Pappus of the central flowers filiform ; 

 of the outer none or dissimilar. 



F. Germanica Linn. : stem dichotomous or proliferously branched at the 

 summit ; leaves linear-lanceolate, acute, tomentose ; heads few-flowered, in 

 subglobose clusters, terminal and dichotomal ; scales of the involucre awned. 

 Gnaphalium Germanicum Willd. 



Fields and pastures. N. Y. to Virg. July, Aug. (1). — Stem 4 — 8 inches 

 high, more or less branched, woolly- tomentose. Heads small, in roundish capi- 

 tate clusters. Scales of the involucre yellowish, very acute. Introduced. 1 



Herba Impia. 



48. ANTENNARIA. Gcert. —Antenna.r'm. 



(Named in allusion to the bristles of the pappus, which resemble the antennce 

 of some insects.) 



Heads many-flowered, dioecious ; the corolla tubular ; in the 

 pistillate flowers filiform, 5 -toothed. Scales of the involucre 

 imbricate, colored, scarious. Receptacle convex, alveolate. 

 Achenia nearly terete. Pappus in a single series ; in the pis- 

 tillate flowers filiform ; in the staminate clavate. 



1. A. flantaginea R. Brown: stem simple, with procumbent shoots; 

 leaves silky-villous when young, but when old smoothish above and ca- 

 nescent beneath ; radical oval, petiolate, 3-nerved ; cauUne linear : heads in 

 a small crowded corymb. Gnaphalium plantagineuvi Linn. G. dioicum 

 var. plantaginifolium Mich. 



Woods. Hudson's Bay to Flor. W. to the Rocky Mountains. April — June. 

 '2|.. — Stem 3 — 8 inches high, downy. Radical leaves often large and broad. 

 Heads few, (sometimes a single large one,) oblong, pedicellate, with a white 

 involucre. Plantain-leaved Cud-weed. 



2. A. margaritacea R. Brown : stem erect, tomentose ; leaves linear- 

 lanceolate, acuminate, 1-nerved, green and lanuginous above, tomentose 

 beneath ; heads in a terminal corymb. Gnaphalium margaritaceum Linn. 



Woods and fields. Can. to Car. W. to Oregon. Aug., Sept. %. — Stem 



