it might be mistaken for another species of Senefeldera. 
It differs from Sebastiania in lacking stipules, leaf blades 
entire and biglandular at the base, stamens on short fil- 
aments and not exserted, and in the stouter, spiciform 
inflorescences in which the staminate inflorescence has 
more numerous flowers subtended by each bract. From 
Sapium the genus differs largely in having carunculate 
seeds (mostly ecarunculate in Sapiwm), a deeply 3-parted 
staminate calyx (Sapium has a 2-8-lobed staminate 
calyx), and entire leaf margins (Sapiwm has mostly den- 
ticulate margins). 
Senefelderopsis Croizatii Steyermark sp. nov. 
Arbor 8—-13.3-metralis ; ramulis robustis, 5-8 mm. dia- 
metro, glabris, apice dense foliatis; petiolis 8-21 mm. 
longis, glabris; laminis coriaceis, subtus argenteo-albidis, 
marginibus subrevolutis roseo-purpureis, elliptico-obova- 
tis vel obovatis, apice acutis vel obtusis, basi acutis, 6-18 
em. longis, 2.5-6.5 em. latis, glabris, penninerviis, costis 
secundariis utroque 10-12 fere angulo recto patentibus 
prominentibus e margine 8-5 mm. anastomosantibus, 
supra basin glandulis 2 obsitis, inflorescentiis 8-4 in apice 
ramulorum confertis vel in axillis superioribus solitariis, 
5-11 cm. longis; pedunculo inflorescentiae 2—2.2 cm. 
longo ; rhachidi crassulo striatulo parce ferrugineo-tomen- 
toso, 2-3 mm. diametro, sulphureo-viridi; inflorescentia 
mascula: bracteis triangulari-ovatis vel ovato-oblongis, 
acuminatis vel acutis, 0.5-2 mm. longis, 0.5-1.5 mm. 
latis, inferne parce ferrugineo-tomentosis, marginibus 
irregulariter eroso-denticulatis, quam glandulis lineari- 
oblongis, nigris, 2-2.5 mm. longis brevioribus; floribus 
masculis luteis, 6-8 in axillis bractearum sitis; calycis 
masculi laciniis 8 ovatis, obtusis, 1 mm. longis, 1 mm. 
latis, extus parce papillatis, marginibus irregulariter ob- 
tuse serrulatis; staminibus plerumque 2-8, aliquando 1; 
[ 46 ] 
