182 PKOCEEDINGS OP THE AMERICAN ACADExMY 



Mikania suaveolens, H. B. K., which is M. gonoclada, DC. (82) ; M. 

 Houstonis, Willd., or a plant well agreeing with the character of that 

 species, and with the points mentioned by Bentham in Plantae Hart- 

 wegianiB ; but Ervendberg notes it as an erect plant, and the branches 

 are hei'baceous (87, 222). 



Aster (^Oxytripolium, Nutt.) divaricatus, Torr. & Gray (81) ; Erlge- 

 ron scaposu7n, DC. (60); E. (Ccenotus) Unifolium, Willd. (93) ; and 

 a species not unlike £. (Polyactiducm, DC.) delphinifolium, but with 

 entire leaves (69). 



Solidago Canadensis, L., var. procera, Torr. «& Gray (62) ; Hetero- 

 theca Chrysopsidis, DC. (71). 



Baccharis cceridescens, DC, a narrow-leaved variety, which is also 

 B. Alamani, DC. (48) ; B. rhexioides, H. B. K. (44). 



Pluchea subdecurrens, DC. ? var. canescens ; probably a variety of 

 the plant of Xantus, no. 53, from Lower California (p. 160), referred to 

 P. subdecurrens ; but the leaves are larger (3 inches long by half an inch 

 or more in width), the stem niore winged, and both clothed with a ten- 

 der white wooUiness, which, being easily detached, is probably deciduous 

 (343) ; also the very common P. odorata, Cass. (50), Plerocaidon vir- 

 gatum, DC. (59), and Salmea scandens, DC. (49, 316). 



Polymnia macidata, Cav., which is apparently only a variety of P. 

 Uvedalia (206) ; Melampodium heterophyllum, Lag. (80) ; M. divarica- 

 tum, DC. (86), and 



Melampodium gracile, Less. var. ohlongifolium : foliis oblongis seu 

 lanceolatis nunc subintegerrimis (M. oblongifolium, DC.) nunc sinuato- 

 lobatis vel panduratis (92). — This is from the same district as Ber- 

 landier's plant on which M. oblongifolium was founded, and is clearly 

 of the same species ; but the cauline leaves are mostly sinuate or pan- 

 duriform, and, although they are not rhomboidal, the plant is pretty 

 clearly a form of M. gracile. 



Ambrosia artemisicefoUa, L,, one of the commonest weeds (168, 

 180). 



Melananthera hastata, Rich., a very small-leaved form, apparently 

 31. oxylepis, DC. (77). 



Crymnolomia ? patens (sp. nov.) : vix pubescens ; caulibus herba- 

 ceis ; ramis gracilibus patentissimis oligocephalis ; pedunculis filiformi- 

 bus ; foliis membranaceis ovatis vel subcordatis caudato-acuminatis 

 argute serratis trinerviis, petioli gracili ; involucri vix biserialis squaniis 

 lanceolato-subulatis disco brevioi'ibus ; paleis receptaculi submembrana- 



