GENUS 31. THISTLE FAMILY. 
67. Aster parviceps (Burgess) Mackenzie & 
Bush. Small-headed Aster. Fig. 4348. 
Aster ericoides parviceps Burgess; Britt. & Brown, II. 
Fl. 3: 379. 1898. 
Aster parviceps Mackenzie & Bush, Fl. Jackson Co. 196. 
1902, 
A. a lass farviceps Fernald, Rhodora 10: 94. 
1908. 
Pilose, sometimes slightly so, much branched above, 
1°-23° high, the branches ascending. Basal leaves 
spatulate; stem leaves linear to linear-lanceolate, 
1-3’ long, often with short leafy branches in their 
axils, those of the branches very small; heads many, 
paniculate; involucre about 2” high, turbinate, its 
linear-subulate bracts imbricated in several series; 
rays 10-12, white, about 2” long. 
Dry prairies and open woodlands, Illinois, Iowa and 
Missouri. Aug.—Sept. 
68. Aster depauperatus (Porter) Fernald. 
Serpentine Aster. Fig. 4349. 
Aster ericoides pusillus A. Gray, Syn. Fl, 17: 184. 1884. 
Not A. pusillus Horn. : 
Aster ericoides depauperatus Porter, Mem. Torr. Club 
5: 323. 1894. 
Aster depauperatus Fernald, Rhodora 10: 94. 1908. 
Aster parviceps pusillus Fernald, Rhodora 11: 59. 1909. 
Glabrous, slender, widely branched, 4’-15’ high. 
Basal leaves spatulate or oblanceolate, obtusish, 3’-13’ 
long, narrowed into petioles; stem leaves linear to 
linear-subulate, 1’ long or less, 4’-1” wide, those of 
the branches minute; heads many, terminating short 
branchlets; involucre turbinate, about 2” high, its 
bracts linear-subulate, acute, rays white, about 2” 
long. 
On serpentine barrens, southern Pennsylvania and 
West Virginia. Aug.—Oct. 
69. Aster paludosus Ait. Southern 
Swamp Aster. Fig. 4350. 
Aster paludosus Ait. Hort. Kew. 3: 310. 1789. 
Heleastrum paludosum DC. Prodr. 5: 264. 1836. 
Stem roughish, or rough-pubescent, slen- 
der, simple, or somewhat branched above, 
1°-23° high. Leaves linear, entire, glabrous, 
but margins rough or ciliate, rigid, 2-6’ long, 
2-4” wide, mostly I-nerved, acute, the lower 
part commonly sheathing the stem; heads 
few or several, racemose or paniculate, 13’-2’ 
broad; involucre broadly campanulate or 
hemispheric, its bracts imbricated in about 5 
series, foliaceous, ciliate, the outer lanceolate, 
acute, the inner oblong or spatulate; rays 
20-30, deep violet, 5-7” long, pappus tawny; 
achenes 8-10-nerved, glabrous, or nearly so. 
In swamps, Kansas and Missouri to Texas, east 
to North Carolina and Florida. Aug—Oct. 
