CONTRIBUTIONS TO THE QUEENSLAND FI-ORA. 79 
PLACOSPERMUM gen. nov. 
Flores hermaphroditi. Perianthium cylindraceum regularis 
vel parum irregularis, superne recurvum (segmentis 4, demum 
solutis ?). Stamina 4, antheris linearibus quorum 3 imper- 
fectis, filamentis infra medium perianthii insertis. Glandule 
hypogyne 4, anguste. Ovarium subsessile, angustum, ovulis 
numerosis uniseriatis. Folliculus coriaceo-lignosus, pluris- 
permus. Semina compressa, samaroidea, late alata. Arbor. 
Folia alterna, integra, coriacea, pennivenia. Flores racemosi, 
racemis ad apices ramorum paniculatis. 
Flowers hermaphrodite. Perianth terete or cylindrical, 
recurved in the upper part ; segments 4, regular or nearly so. 
Anthers 4, but only one perfect in each flower, linear, with 2 
linear parallel cells adnate to the connective ; filaments erect, 
linear or oblong, inserted below the middle of the perianth 
segments. Hypogynous scales 4, linear or setaceous, distinct. 
Ovary scarcely stipitate, narrow and terete ; ovules numerous ; 
style continuous with the ovary. Fruit a follicle with a thin, 
woody exocarp, I-celled. Seeds numerous, in a single row, 
flat and broadly winged ; testa membranous ; cotyledons thin 
and flattened. <A tall tree. Leaves alternate, often crowded 
towards the ends of branchlets, entire and penninerved. 
Flowers singly pedicellate in racemes arranged in panicles at 
the ends of branchlets ; pedicels subtended by bracts. 
Derivation : From Greek plax, a flat body ; sperma, a seed ; alluding 
to the flattened seeds. 
This genus evidently constitutes a new tribe of the sub-family 
Grevilleoidez, as it cannot be included in any of the tribes described in 
Bentham and Hooker’s “‘ Genera Plantarum” or Engler and Prantl’s 
“ Naturlichen Pflanzonfamilien.”” The new tribe, for which we propose 
the name Placospeimeze, could be placed between Embothriex and 
Banksiz as under :— 
Sub-family Grevilleoidece.—Flowers in pairs or single in the axils of 
the bracts. Ovary with 2 or numerous ovules. Fruit with 1 or numerous 
seeds. 
Grevillee.—Ovary mostly with 2, rarely 4, ovules. 
Embothrice. 
Placospermee. 
Ovary with 4 or more ovules in two series. 
Ovary with 15 or more ovules, in a single series. 
Seeds transversely arranged in the follicles. 
Banksice.—Ovary with 2 collateral ovules. 
Placospermum coriaceum sp. nov. Arbor glabra; ramulis 
validis ; foliis petiolatis spathulatis vel oblanceolatis obtusis 
coriaceis, marginibus integris recurvulis ; paniculis terminalibus 
