136 AMERICAN MIDLAND NATURALIST 
Dioecious trees with opposite pinnately compound leaves, 
leaflets serrate and usually irregularly, to biserrate, and variously 
cleft. flowers precocious, apetalous: staminate in drooping 
umbels, pistillate in racemes or imperfect panicles: calyx small;, 
disk none: stamens 4-6, long filamentary: fruit a samara like 
that of Acer: samara wings separately and tardily dehiscent. 
1. RULAC NEGUNDO (Linn.) A. S. Hitchcock, 1894.* 
Negundo aceroides Moench, 1794.+ 
Negundo virginianum Medik. 1800,t to include Negundo 
trifoliatum Raf.,§ and Negundo lobatum Raf., || 
Negundium fraxinifolium Rafl., 1808.4 
Negundo fraxinifolium D. C., 1824.** 
Negundo fraxineum Steudel, 1841,,7 nomen tantum. 
Negundo Negundo (Linn.) Karsten, 1880-83.tt 
Small or middle-sized dioecious tree, with green glabrous twigs 
and pinnately compound leaves: Jeaflets 3-7 usually 3-5 on flower- 
ing branches, and 5~7 on sterile and growing shoots: J/eaflets thin 
membranous glabrous at maturity with a few scattered hairs 
especially on the veins beneath; leaves drying to an olive brown: 
terminal leaflet and the two basal often 3-lobed or cleft, (the 
latter never both completely divided into three leaflets) all vari- 
ously roughly and irregularly serrate or dentate, middle leaflets 
rounded or subcordate, the others so when lobed, otherwise cuneate 
or narrowed at the base; secondary veins not prominent, rather 
inconspicuous; petioles green, glabrous. Flowering racemes 2, 
opposite, near the end of the twigs of the preceding year’s growth 
on short side branches 1-2.5 cm. long, peduncles 3-5 cm. long with 
1-2 opposite small simple or ternate leaves, usually entire: fruiting 
racemes about 2 on a twig; samaras attenuate at the base, wings 
usually widely divergent forming an obtuse or right angle on the 
outer margins: seed body minutely pubescent. 
Hitchcock, A. S. Spring Flora of Manhattan, (1894), 6. 
Moench, "C) Meth: Pir (17.94) 8 ps 334: 
Medikus. Pfl. Anat. (1800), p. 439. 
kee lll: Sela 
~* > DeCandolle, A... P.-“Prodromus,- Vol. J. (7824), pe sae: 
Tt Steudel, E. T. Nomenclator Botanicus. Vol. IL, (1841), p. 188. 
ti Karsten. Deutschl. Fl. (1880-1883). p. 596. 
ett —- 
