58 NATURAL HISTORY OF PLANTS. 
VI. GYROSTEMONEX. 
16. Gyrostemon Desr— Flowers diæcious. Male calyx small, 
unequal 4-8-dentate ; teeth imbricate, finally not contiguous. 
Stamens 6-w , 1- or © -verticillate; anthers subsessile, cuneiform, all 
inserted on the convex receptacle or round processus of central 
column, 2-celled, lateral 2-rimose; connective produced beyond, 
cells, short and obtuse. Female calyx as in male flower. Carpels 
4—x , verticillate round more or less long conical receptacle. Germens 
l-ovulate, produced in styles more or less incurved or reflexed at apex, 
inwardly stigmatiferous; ovule subbasilar, ascending; micropyle 
extrorse, inferior. Fruit subglobose or obconical (Codonocarpus), in 
follicles 4-c , constant, finally separating from columella (of variable 
form, furnished with 4— persistent apices of style), and among 
themselves, dehiscing either dorsally and longitudinally (Gyrostemon) 
or by ventral clefts (Codonocarpus). Seed ovate, pseudo-campylo- 
tropous, hippocrepiform, alternately ascending more or less 
from the internal angle of the carpels; testa transverse rugose, 
arillate at micropyle and hilum ; embryo hippocrepiform ; cotyledons 
narrow, incumbent; radicle inferior, extrorse ; albumen thin, or more 
or less copiously farmaceous.—Ramified shrubs (or herbs?) glabrous ; 
leaves alternate sessile articulate ; stipules small, lateral ; limb linear- 
subulate, or membranous-subcarneous ; flowers reduced to leaves 
sometimes (Codonocarpus) to bracts, axillary, solitary, pedunculate 
(Australia). See p. 41. 
17? Tersonia Mog —Flowers nearly of Gyrostemon; males 
8—o -androus ; stamens round the base of processus of central recep- 
tacle l-seriate. Carpels oo (15-30) in the fruit depresso-globose, 
ligneous, transverse, rugose, connate, indehiscent; seeds and other 
characters of Gyrostemon.—Shrubs ; leaves linear; flowers axillary, 
subsessile (Australia). See p. 43. 
18. Didymotheca Hook. r.—Flowers dicecious, 4-merous. Calyx 
short ; 2 lateral lobes longer and narrower. Stamens 8, 9; anthers 
subsessile, erect, obpyramidal ; cells 2, lateral marginally rimose. 
Germen free; carpels 2, lateral 2-dymous, compressed; style 2, 
