412 THE KINDS OF PLANTS 



stem leaves few, entire, sessile and partially clasping: heads 1-7. on long 

 peduncles: rays numerous, linear or spatulate, purplish or pinkish: April 

 to June. 



30. CALLtSTEPHUS. China Aster. 



Erect, leafy annuals, with large solitary heads bearing numerous white, 

 rose or purple i-ays: scales in several rows or series, usually leafy: torus 

 flat or nearly so, naked: pappus of long and very short bristles. 



C. hort^nsis, Cass. Common China aster, now one of the commonest of 

 garden annuals, in many forms: leaves sessile and coarsely toothed. China. 



31. ANTENNARIA. Everlasting. 



Perennial little herbs with cottony leaves and stems: flowers dioecious, 

 in many-flowered small heads, solitary or racemose or clustered (much 

 resembling Gnaphalium, but distinguished by the dioecious heads) : invo- 

 lucre with dry imbricated bracts in several rows, usually woolly-white or 

 colored: pappus in a single row, that of the sterile flowers thickened and 

 plumed at summit. Several confused species, or forms of one species. 



A. plantaginifolia. Hook. Mouse-ear everlasting . Noticeable on dry 

 soil and in open places, as white cottony patches: stoloniferous root-leaves 

 soft-white when young, later green above but hoary beneath, oval to spatu- 

 late, petioled, 3-veined: flowering stem simple scape-like, 4 to 8 in. high, 

 bears small, bract-like, appressed leaves, and heads in a small, crowded, 

 terminal corymb: scales of involucre whitish. 



32. ANAPHALIS. Everlasting. 



Cottony-white herbs, very similar to the preceding, but pappus not 

 thickened at summit, and usually a few perfect but sterile flowers in center 

 of the head: stem leafy. Perennial. 



A. margaritacea, Benth & Hook. Peart]! everlasting. One to 2 ft.: 

 heads in corymbs at summit, dioecious, but a few imperfect staminate 

 flowers in the center of the fertile heads: leaves sessile, taper-pointed, 

 broad ovate to linear lanceolate: involucre scale, pearly white, rounded. 

 Common in dry soil. 



33. GNAPHALIUM. Everlasting. Cudweed. 



Cottony-white herbs, with small head of many whitish flowers, sur- 

 rounded by involucre of white or colored scales, in many series: flowers all 

 fertile, outer pistillate, central perfect: no chaff on receptacle: pappus a 

 row of slender bristles. Common in dry fields. 



G. polyc6phalum, Michx. Annual, with leaves lanceolate, margins wavy, 

 upper surface not very Cottony: scales of involucre white or yellowish- 

 white, a few perfect flowers in the center of each head. 



G. deciirrens. Ives. Biennial or annual, with many perfect flowers in 

 center of each head: stem erect, 1 to 2 ft.: leaves lance-linear, both side* 

 cottony, bases partially clasping and running down the stem. 



