125. CoMi'osiTAE 253 



Tribe 5. Gnaplinlieae 



2 1 . Pluchea Cass. — Marsh Fleabano 

 P. camphurata (L.) DC. Swamps and sloughs, not conunon, 

 southern 111. July-Oct. 



22. Antennaria Gaertn. — Pussytoes. Ladies'-tobacco 



1. Rosette leaves comparatively small, usually less than 3 cm long, 

 1 -ribbed, or indistinctly 3-ribbed. 

 2. Rosette leaves obovate, abruptly contracted below the middle 

 into a petiole-like base; roadsides and open woods; De- 



Kalb and Henry counties. May-June 



- A. neodioica Greene 



2. Rosette leaves cuneate-spatulate, gradually tapering to the 



sessile base; fields, roadsides, and pastures, or open wooded 



slopes. Apr.-May A. neglecta Greene 



1. Rosette leaves larger, distinctly 3-ribbed, 3-12 cm long. 



3. Upper surface of leaves dark green and glabrous or nearly so 



from the beginning; involucres 7-11 mm high; upper part 

 of stem usually with a few small glands; dry soil in open 

 woods and on bluffs, locally throughout 111., except the 



southern counties. May- June A. parlinii Fern. 



3. Upper surface of leaves arachnoid or tomentulo.se at first, 

 tardily glabrate in age; stem glandless. 

 4. Heads small, the involucres of the pistillate plants 5-7 mm 

 high; wooded slopes, common throughout 111. Apr.-May 



- A. plantaginifolia (L.) Hook. 



4. Heads larger, the involucres of the pistillate plants 7-9 mm 

 high. 

 5. Rosette leaves rhombic-obovate, widest at or below the 

 middle, usually acutish; pastures and open woods, com- 

 mon. May-June. [A. occidentalis Greene] 



A. falla.x Greene 



5. Rosette leaves spatulate, widest above the middle, rounded 

 at the apex; sandy ridges or open woods near Lake 

 Michigan, rare; Lake Co., F. C. Gates in 1908 [A. oc- 

 cidentalis of auth., not Greene] A. munda Fern. 



23. Gnaphalium L. — Cudweed 



1. Heads in cymose or paniculate clusters; pappus-bristles not united. 



2. Stems 30-90 cm tall, simple below, bracts white; achenes 



smooth. 



3. Leav'es not decurrent; plants not glandular; outer bracts 



obtuse; fields, roadsides, and open woods, common. Aug.- 



Oct. Sometimes mistaken for Anaphalis margaritacea 



(L.) A. Gray, which is not known to occur in 111. Sweet 



Everlasting [G. polycephalum Michx.] 



G. obtusifolium L. 



