spreading or ascending lobes about 1 mm. long or about one half the length of 

 the funnelform throat. A. pantotrichus Blake. 



In alluvial soils in thickets, wet meadows, river bottomlands and in seepage 

 along streams, in Okla. {Waterfall), Aug-Oct.; Que. to Minn, and S.D., s. to 

 Tenn., Miss., Ark. and Okla. 



14. Aster lateriflonis (L.) Britt. 



Perennial from subrhizomatous bases or slender short rhizomes; stems ascend- 

 ing or usually long-arching, semireclining, usually with several whiplike arching 

 secondary branches, the latter bearing in turn a number of very short second 

 head-bearing branchlets; leaves of midstem usually membranous, elliptic or lance- 

 elliptic, serrate, to several cm. long and 15 mm. broad but usually smaller, sessile, 

 those of the distal head-bearing region still smaller and those few of the very 

 short head-bearing branchlets minute and subulate; heads not very crowded; 

 involucres turbinate to hemispheric, 4-5.5 mm. high; phyllaries in 3 or 4 rows, 

 strongly graduated, the shorter row only about a fourth as long as the longest, 

 mostly pale-stramineous, the dilated portion of the midrib rather smaller (so 

 nearly the whole involucre appears stramineous); rays few and only about 3 mm. 

 long, usually white; mature disk corolla 3-3.5 (-3.9) mm. long, with a tube 1-1.5 

 mm. long, plus a throat 0.8-1.2 (-1.4) mm. long, plus lobes 0.7-1 (-1.2) mm. 

 long. Incl. var. flagellaris Shinners and var. indutus Shinners, and Tex. plants which 

 have been through error determined as A. ontarionis Wieg. 



In swamps, wet depressions in prairies, borders of streams, ponds and sloughs, 

 and in sandy usually moist or boggy areas in Okla. (McCurtain Co.) and in e. Tex. 

 (s.w. to Gonzales Co.), rare to s.e. Tex. (Harris Co.), Oct.-Nov.; other varieties 

 occur in s.e. Can. s. to Ga., Tenn. and Ark. 



15. Aster vimineus Lam. 



Perennial from long creeping or sometimes apparently short and stouter rhi- 

 zomes, the stem 4-15 dm. tall, glabrous or more or less puberulent in lines; leaves 

 glabrous on both sides or slightly scabrous above, linear or narrowly lanceolate, 

 acute, tapering to the sessile base, entire or slightly toothed, to 1 1 cm. long 

 and 10 mm. wide, those of the branches becoming much reduced; heads numerous 

 in an open ample inflorescence with long divaricate divergently bracteate often 

 recurved branches which tend to be secund, the minutely bracteate peduncles 

 short or sometimes as much as 1.5 cm. long; involucre 2.5-3.5 or rarely 4 mm. 

 high, glabrous; phyllaries imbricate in several series, their green tips mostly 

 elongate; rays 15 to 30, white or rarely purplish, 3-6 mm. long; lobes of the 

 disk corollas comprising about 40% of the limb; achenes few-nerved, sparsely 

 hairy. 



Mostly in moist open places and along river bottoms, wet meadows, swamps 

 and alluvial soil about ponds and along streams, in Okla. (McCurtain Co.), Aug.- 

 Oct.; Me. to Fla., w. to O. and Okla. 



16. Aster simplex Willd. 



Perennial from long often stout creeping rhizome, becoming densely colonial; 

 stem stout, commonly 6-15 dm. tall, glabrous below, pubescent in lines above, 

 sometimes very scantily so; leaves lanceolate or linear, serrate or occasionally 

 entire, glabrous on both sides or somewhat scabrous above, sessile or tapering 

 to a petiolelike base, sometimes a little clasping but scarcely auriculate, the 

 principal ones mostly 8-15 cm. long and 3-35 mm. wide, mostly not strongly 

 reticulate, the areolae (if visible) generally irregular and longer than wide; heads 

 usually more or less numerous in an elongate leafy inflorescence, the involucre 

 3-5.5 mm. high; phyllaries narrow, sharply acute to acutish, glabrous except 



1624 



