412 



F. Pedde. 



1907, on an open sunny hillside not far from the foot-hills of the Turtle 

 Mountains, Rolette County, near Dunsieth. 



1066. Aster lautus J. Lunell, 1. c, p, 146. — Caulis 7—18 dm altus, 

 lineis pubescentiae longitudinalibus de foliis decurrentibus, praeterea 

 glaber, parte inferiore una cum foliis languescentibus glabrescente, ramis 

 late divaricatis et horizontalibus quoque et retroflexis paniculate ra- 

 mosus. Rami etiam in lineis longitudinalibus pubescentes, inferiores 

 quidem vel medii longitudinera 3 dm saepe obtinentes. Folia lanceolata 

 usque lineari-lanceolata, serrulata vel Integra, 0,5—1,5 dm longa, 5 

 17 mm lata, acuminata, in basin sessilem, 4 — 5 mm latam attenuata, 

 marginibus ciliatis exceptis glabra. Capitula 20 — 28 mm diametro^ 

 numerosa. Involucra conica, 5 mm alta et 5 mni lata. Bracteae in 

 4 series dispositae, laxae vel apicibus paene squarrosis praeditae, lineares, 

 acutae, apicibus autem longe attenuatis absentibus, cilio-marginatae, ex- 

 ternae virides, latiores internis quae plerumque apices oblanceolatos, 

 virides habent. Plores radiati 1 — 1,2 cm longi, circiter 45, violacei vel 



purpureo-albi. Pappus sordide albus. 



Species apt to be confounded 



with this are A. longifdius Lam., which has a more contracted inflores- 

 cence on erect or ascending branches, the pubescence on the branches 

 scattered, its bracts glabrous, erect, almost equal, imbricated in only 1 

 or 2 series, and its pappus pale; A, salicifoUtis Lam., which has a con- 

 tracted inflorescence on erect or ascending branches, leaves thickish 

 and shorter, 0,5—1 dm long, 0,5—1,5 cm wide, „broad-linear or linear- 

 oblong bracts with conspicuous elliptic or subrhombic green tips"^ 

 (Gray's Manual VII, p. 803), and pappus white; and A. laetevirens Greene, 

 which has broader leaves, fewer heads, bracts with withe midrib, and 



outer bracts broader than the inner. 



North Dakota: This elegant 



species is not unusual in yards or in moderately damp, rich prairie soil, 

 and was collected by the writer on August 27, 1911, at Leeds, Benson 

 County, 



LXXIV. prof. Dp. 5. 5c 5 be. 

 Ctd^tbilber ^nx pfIait5citgcograpfjte «nb 3ioIogk. 



85.-88. Hcii?e (Hr. \2\—!{\0) ^. Sc^encf, ^rafilicui). 



A. Subbrafilifc^er Hegenmalb. 



Der tropifcf?»amerifanifd?c Hcgcnroalb crftrecft fic^ Wngs 6cr 

 braftltanifdjcn 0ftfuftc infolgc bcs gunftigcn €infiuffc5 6cs SO.paffat* 



1) Bilb \2\ — \Z2 nai^ pljotograpljtfc^cn 2ltifndljmen in bet Umgebung ooit 

 Sltttnenau, Staat Santa tatljarina, 1886. <»33 aus bem Staate Parana naA^ cinct 

 Fanfitti^cn plitrtogtapfite, \^\, -^36, <^37, -^39, o,\o nac^ 2Jnfnat?mai bei <£obo ^0, 

 Staat Sio be Janeiro, 1887. -^35 u. ^38 bet Kto be Janeiro, i887. — Dgl. Karficrt 

 anb St^cncf, Pegetattonsbilber. i. Heilic, f^eft \ u. ?. — (£. UIc in <HngI. 3ot. 

 3al}tb.i XXVIII r\«ion, S. sn. • 



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