532 ROBINSON. 



paniculatum h. Heyne ex Schauer in DC. Prod. xi. 623 (1847), in 

 synon. Vitex involucratus Presl, Bot. Bemerk. 148 (1844). Sphaeno- 

 desma unguiculata (Wall.) Schauer in DC. Prod. xi. 623 (1847). 



In a recent attempt to verify the identification and labelling of the 

 Verbenaceae in the Gray Herbarium, corrections were noticed which 

 should be made in the current treatment of two species of the Gala- 

 pagos Islands, namely: 



1) The plants which have been treated as Avicennia tomentosa Hook. 

 f . Trans. Linn. Soc. xx. 195 (1847) ; Anderss. Om Galap.-oarnes Veg. 

 201 (1853), also reprint, 82 (1857); Robinson & Greenman, Am. Jour. 

 Sci. ser. 3, 1. 147 (1895); and A. officinalis Robinson, Proc. Am. Acad, 

 xxxviii. 194 (1902), not L., are referable to A. nitida Jacq. 



2) The plants of the Galapagos Islands treated as Lippia lanceolata 

 Rose, Contrib. U. S. Nat. Herb. i. 137 (1892), not Michx.; L. nodiflora 

 Robinson & Greenman, Am. Jour. Sci. ser. 3, 1. 147 (1895), not Michx.; 

 and L. canescens Robinson, Proc. Am. Acad, xxxviii. 196 (1902), not 

 HBK., are all to be referred to L. keptans HBK. Nov. Gen. et Spec, 

 ii. 263 (1817), a species fairly well marked as to its firmer veins and 

 more salient teeth of the leaves. 



Ageratum Houstonianum Mill., var. muticescens, var. nov., sta- 

 tura foliis pubescentia floribus etc. formae typicae simillimura differt 

 squamis pappi flosculorum vel omnium vel plurium valde reductis 

 muticis ca. 0.1-0.2 mm. longis.— Mexico: Wartenberg, near Tanto- 

 yuca, prov. Huasteca, collected in 1858, L. C. Ervendberg, no. 100 

 (type, in Gray Herb.); without locality, from the herbarium of the 

 late Dr. F. W. Klatt (Gray Herb.) ; cultivated in the Missouri Botani- 

 cal Garden, from 1886 (when collected by Pammel) to 1896 (when 

 a second specimen was prepared by H. C. Irish). The specimens, now 

 in the herbarium of the Missouri Botanical Garden, show by their 

 labelling that the plant has passed under several horticultural names, 

 "Stella Gurney," "Cope's Pet," etc. The seed is said to have come 

 from Haage & Schmidt's establishment. In these specimens the 

 pappus, though for the most part short and muticous, shows some 

 variability on one and the same plant or even in the same head, certain 

 florets, especially the central ones and those of the terminal heads, 

 tending to have awned scales in the manner of the typical form. 



Eupatorium brachychaetum, spec, nov., herbaceum vel cum cau- 

 dice ramoso 1 dm. longo pauUo lignescenti; caulibus subscaposis 2-2.5 

 dm. altis gracilibus puberulis purpurascentibus basin versus solum 

 foliosis apice 2-4-capitulatis ; foliis oblanceolati-oblongis tenuibus op- 

 positis 8-11 cm. longis 2-2.5 cm. latis duplice crenato-lobulatis vel 



