18 DR. M. T. MASTERS ON THE FLORAL CONFORMATION 
this latter stamen is therefore separated from the centre of the 
petal by a gland belonging to the outer series. Fifth row or gy- 
necium, ovary connate with the flower-tube, or more or less free 
from from it, one-celled, with 5 parietal placentas supporting 
numerous ovules. Styles coherent at the base, or free. 
The arrangement of the stamens and glands may be more 
clearly made evident by the following diagram, where $ repre- 
sents the sepals, P the petals, x the glands, st the stamens. 
S S S S S 
P P P P P 
x st x st x st X st x st X st x st X st x st X st 
x st x st x st x st x st 
Guillemin describes the position of the stamens and glands 
almost precisely in the same way :—“ Stamina duplici serie dis- 
posita numero triplici petalorum, duobus exterioribus ad latera 
cujusque petali, glandula interjecta; uno interiore ante glandu- 
lam petalo oppositam glandula hine et illine comitato." 
In the diagram given in Delessert’s ‘Icones, the artist com- 
mitted an error, to which Guillemin thus alludes :—“ In serie 
interna glandularum et staminum due glandule collaterales inter 
stamina errore gravi delineate fuerunt dein unica glandula 
reipsa exstet inter stamina." It is the more necessary to call 
attention to this correction, as Lindley, in the * Vegetable King- 
dom,’ p. 742, has repeated the diagram without making the ne- 
cessary alteration. 
Adverting now to the arrangement of the androecium in some 
nearly allied genera, we find the most simple condition in Black 
wellia (Homalium § Blackwellia, Benth.). Here there is a single 
stamen in front of each petal, and no glands at all. Visa (re 
ferred to Homalium by Bentham and Hooker) is described 
having a similar structure, but with a gland between each pair 
of stamens. In Casearia, which is not quite so closely allied to 
Byrsanthus as the preceding, we have a single series of fertile 
stamens alternating with petaloid staminodes. In Bivinia the 
stamens are grouped in fascicles between the sepals, and there 
are five glands opposite to the sepals. The petals are absent in 
this genus. 
In Dissomeria and in Homalium $ Racoubea, the stamens are 
numerous, and arranged in fascicles before the petals. In My 
riantheia (referred by Bentham and Hooker to Homalium) 9 
