506 



SoUdago rigida L. Sp. PI. ii, S80 (1753). 



Miu'li smaller than llui form common in casti-rn Nebraska. 3 to 6 dm. high, more 

 cinereous; corymb more open and heads smaller; radical antl lower cauline leaves 

 •jradually acuminating into a winged pt-tiole. all with a clasping but not decurreut 

 base. Custer, dry land, altitude 1.700 m., August Id (No. 7()!l). 



Euthamia gramlnifolia (I-.) Nutt. (Icn. ii. 1(52 (1818); Chrysocoma iirnminifoHa L. 

 Sp. PL ii, 811 (1753); Solida'jo lanviolaia 1>. Mant. 11 1 (1767). 



The corymbs in all specimens seen in the IJlack Hills are unusually suiall and dense 

 with larger heads. Hot Springs, altitude 1,100 m., August 10 (No. 770). 



Aster sibiricus L. Sp. I'l. ii, 872 (1753). 



Slia<led hillsides: Custer, altitude 1,700 m., August 13 ; IJot lif'ord, altitude 1,70() m., 

 .luly 12 (No. 771). All siiccimens are unusually low. 



Aster laevis I^. iSji. 1*1. ii, 870 (1753). 



All the specimens are small, some very low and slender, with uarniwly laucenlate 

 leaves. Custer, altitude 1,700 m., August 10 (No. 772). 



Aster multiflorus incanopilosus (Lindl.) Kydb. Contr. Nat. Herb, iii, 103 (1S95); 

 A. ramuhmis hicaiiojyilosiia Lindl.; Hook. 1"1. Bor. Amcr. ii, 13 (1834); .1. inultiHorit>i 

 commiiiatua Torr. »fc Gr. V\. ii, 121 (1841). 



Custer, altitude 1,600 m., Angu.st 16 (No. 773). 



Aster patulus Lam. Eucycl. i, 308 (1783). 



Like .1. prcnanilioidoi Muhl., but the base of the leaves is not cordate at all. Only 

 a few si)ecimens secured. Custer, altitude 1,700 ni., .Vugust 13 (No. 774). 



Aster juuceus Ait. liort. Kew. iii, 204 (178'J). 



See my remark on this species, this volume, ]i. 1()3. 'flu- leaves are linear, 1-ucrved, 

 with slightly revolute margins. 

 Wet meadow: Custer, altitude 1,600 m., August 15 (No. 775). 



Aster salicifoliua Lam. Encyl. i, 306 (1783). 



Meadow: Custer, altitude 1,600 m., August 15 (No. 77()). 



Aster ptarmicoides (Nees) Torr. A: Cr. Fl. ii, 160 (1841); DoelliHtjcria jitnrmiroides 

 Nees. (len. A: Sp. Ast. ls3 (1832). 



Limestone District, near Bull Springs, altitude 1,900 m.. .Inly 25 (\t). 777). 



Aster falcatus Lindl. ; DC. Trodr. v, 241 (1836). 



Li (iraj^'s list, Newtou «fc Jenney's Keport'; uo specimens from this region seen by 

 the writer. 



Aster pauiculatus Lam. Kncy<l. i, 306 (1783) ; J xhiqjlt.c W illd. i:uuiii. NS7 (.IMO'J). 



lu (Jray's list only.- 



Aster tauacetifolius II. B. K. Nov. Cen. iv, 95 (1820). 



In (Jray's list only.- 



Erigerou asper Nutt. (Jen. ii. 147 (1818). 



More or less strigoso all over. Generally 3 to 5 dm. liigh, with sovoral heads; but 

 in higher altitudes they are only 2 to 2.5 dm. high, with 1 to 3 heads. I'ormer state, 

 Kochford, altitude 1,600 m., July 11; latter state. Limestcuie District, July 2t> 

 (No. IIH). 



Erigerou subtrinervis Kydberg, Mem. Torr. Club. v. 328 (1894) ; J:. tjlahcUus moUia 

 Gray, Proc. Acad. Phila. 1863, 61 (1863), not !■:. molliH I). Don, Prodr. Fl. Nep. 172 (1825). 



Plant hairy throughout, from grayish scabro-strigoso to soft-pubescent, leafy to 

 the top; leaves thin, more or less distinctly trii)le-nerved, the lower oblanceolate, 

 petioled, the Tipper obbmg to ovate-lanceolate, sessile and half-clasping; heads 1 to 

 5, corymbose, 1.5 cm. wide and 0.75 cm. high; rays 0.75 to 1 cm. long, blue or llesb 

 color; involucre hirsute. 



' Geol. Surv. Black Hills, 531 (1880). " -Loe. cit. 



