50 Contributions from the Gray Herbarium 
Jongae (tubo 0.8mm. longo glabro). Paleae angustae breviter 
acutae mucronulatae leviter carinatae glabrae vel in dorso incurvo- 
hispidae 6-7 mm. longae. Achenia nigra glabra valde compressa 
subquadrangularia 3. 2 mm. longa 1.7 mm. lata. Pappi deciduis- 
simi subaristiformis aristae sursum hispidulae 1.5-2.2 mm. longae 
verisim. ca. 15.— Peru: Province of Chachapoyas, Mathews 
(rypE in Gray Herb.).— From the only other known species, 
Pappobolus macranthus Blake, of Bolivia (Hook. Ic. xxxi. t. 3057 
(1916)), P. mollicomus differs widely in size of leaves and heads, 
shape of phyllaries, and various minor characters, while agreeing 
entirely in all the essential generic features. 
PODACHAENIUM EMINENS (Lag.) Sch. Bip. Hota xliv. 557 
(1861). — Ferdinanda eminens Lag. Gen. et Spec. Nov. 31 (1816). 
Podachaenium paniculatum Benth. in Oerst. Vidensk. Medd. 
Kjobenh. 1852. 99 (1852). ‘“‘ Dicalymma fragrans Lemaire, Illus. 
Hortic. ii. Mise. 37 (1855).” Cosmophyllum cacaliaefolium C. 
Koch & Bouché, “ Ind. Sem. Hort. Berol. 1854,” ex Walp. Ann. 
v. 219 (1858).—In Dalla Torre & Harms’s Genera Siphono- 
gamarum, p. 550 (1905), the name Podachaenium Benth. has been 
replaced by Ferdinanda Lag., presumably through the application 
of the “ theory of residues.’ This course is incorrect. Lagasca 
included two species in his genus, the first, 7. angusta, being Zalu- 
zania angusta (Lag.) Sch. Bip., the second, F. eminens, identical 
with the later Podachaenium paniculatum Benth. The essential 
feature of the generic diagnosis (‘‘ Pappus in seminibus radi? 
paleaceus, paleis 2-5, brevibus; disci nullus...”’) is drawn 
from F. angusta alone, and has no reference to Podachaenium, and 
the same is true of other less important characters mentioned. 
Lagasca was acquainted with his F. angusta in the growing state 
in the Royal Garden at Madrid, but knew F. eminens only from 
dried specimens (“ Vidi Siccam,” he says of it), and obviously 
included the latter species merely because of its similarity of habit. 
The name Ferdinanda Lag. must therefore be referred to the syn- 
onymy of Zaluzania Pers., to which the generic diagnosis applies, 
and the name to be used for the Podachaenium is the one given 
above. The whole subject has been very clearly discussed by 
Schultz Bipontinus (Flora 1. ¢. 553-557). 
ZEXMENIA frutescens (Mill.), comb. nov. — Bidens fruticosa L. 
Sp. ii. 8383 (1753); not Z. fruticosa Rose, Contr. U. 8. Nat. Herb. 
