Helicia .] 
CXI. PROTEACEJL 
132T 
dage. Hypogynous glands equal, distinct or united in a ring or cup round the- 
ovary. Ovary sessile, with a long straight style, slightly thickened at the end 
with a terminal stigma ; ovules 2. Fruit nearly globular, indehiscent with a 
fleshy exocarp. Seeds solitary and globular, endocarp cartilaginous ; cotyledons 
thick and fleshy. — Trees or tall shrubs. Leaves alternate, rarely verticillate, 
entire or toothed. Flowers pedicellate in pairs, in terminal or axillary simple 
racemes, the pedicels of each pair often more or less connate. Bracts often very 
deciduous. 
The genus is spread over tropical Asia extending northwards to Japan. The Australian 
species appear to be all endemic. 
It is only of quite recent date that fruits of the Queensland species of Helicia, Macadamia and 
Cyanocarpus have become known, and from what I have seen of these have come to the 
conclusion that it will be better to allow Cyanocarpus to lapse, and to arrange the Queensland 
species thus : — 
Those with dehiscent fruits with fleshy or juicy exocarp, and thin or cartilaginous- 
endocarp, under Helicia. 
Those with ‘2-valved or irregularly dehiscent fruits, with more or less coriaceous- 
deciduous exocarp and hard bony endocarp, under Macadamia. 
A tall shrub. Leaves verticillate, 4 to 7in. long, 1 to ljin. broad, glossy, 
lanceolate, entire or toothed. Racemes terminal, 4in. long. Flowers 
white, about 9 lines long. Fruit oval-globose, pointed at both ends. ljin. 
long, vermillion 1. II. Youngiana. 
Tree, glabrous. Leaves of thin texture, nerves distant, oblong, 3 to 7in., 
entire, abruptly acuminate. Racemes terminal, 2 to 4in. long. Fruit 
oval, red, lin. long 2. H. Cribbiana - 
Tree, glabrous. Leaves obtuse or obtusely acuminate, 2 to 4in. long, entire 
or toothed, nearly sessile. Racemes slender, usually axillary, 2 to 4in. 
long. Fruit blue, oblong, lin. long 3. H. glabriflora. 
Tree clothed with rusty hairs. Leaves oblong to lanceolate, 3 to 4in. long. 
toothed. Fruit blue, about 5 lines long 4. H. ferritginea. 
Tree or tall shrub clothed with rusty hairs when young. Leaves ovate- 
laneeolate, more or less toothed, texture membranous, 4 to 7in. long. 
Racemes axillary, 2 to 4in. long. Fruit, blue, oval, Jin. long 5. H. Nortoniana * 
Tree, glabrous. Leaves oval, obtuse, or with a long obtuse point, 4 to Sin’ 
long. Racemes axillary. Pedicels very short. Fruit not seen .... 6. australasica. 
Tree, slender, glabrous. Leaves 4 to 7in. long, 1 to ljin. broad, cuneate to 
lanceolate, glossy on both sides. Racemes lateral, including the peduncle 
2J to 3Jin long. Bracts minute, numerous. Perianth crimson . ... 7. H. Heyana. 
1. H. Youngiana (after Sir John Young), Chas. Moore and F. v. M. Fragm . 
iv. 84, and But. Bull. v. 26. A tall rather straggling shrub, the young branchlets 
and inflorescence ferruginous-pubescent. Leaves bright green, shortly petiolate, 
in whorls of 3 or 4, oblong-lanceolate, often long acuminate, entire or more or less 
toothed, 4 to 7in. long, glabrous and glossy above, silky underneath when young. 
Racemes terminal, about 4in. long. Pedicels ferruginous-pubescent about 2 lines 
long. Bracts cillate. Perianth white, about 2 lines long. Anther-connective 
produced into a short obtuse appendage. Hypogynous glands oblong distinct. 
Ovary villous. Style-end ovoid. Fruit vermillion, from globose to oval, and 
more or less pointed at each end, attaining lfin, long and ljin. diameter, 
indehiscent, slightly pubescent ; suture prominent. The fruit becoming uneven 
or rugose in drying ; exocarp somewhat fleshy, quite free from the seed, which 
latter is globose and only covered by a thin, felt-like integument or endocarp. — 
Macadamia Youngiana, F. v. M., Bentli. FI. Austr. v. 406. 
Hab.: Yandina and Eumundi Scrubs, North Coast Railway. 
The fruits of this plant have been suspected of poisonous properties. 
2. H. Cribbiana (after J. G. Cribb), Bail. A glabrous tree about 20ft. 
high. Leaves oblong to oblanceolate, 3 to 7in. long, entire on all the specimens 
to hand, often clustered at the ends of the branchlets, particularly the branchlets 
which form long internodes, thin-coriacous, tapering from above the middle to 
a petioles of 3 to 6 lines, the apex abruptly-acuminate ; primary veins distant* 
