174 
broad connective, the lobes oblique, bursting longitudinally. A rudiment of an ovary. 
Females ; Ovary superior, 2-celled with very numerous ovules attached horizontally to a 
placenta in the axis ; style cylindrical ; stigma obsoletely two-lobed ; [ovules with a large 
conspicuous foramen next the hilum, Griffith in litt.'] — Trees [with the habit and inflo- 
rescence of Combretaceae. Griffitii ] . Leaves opposite, entire, without stipules. Wood 
regularly zoned, with very abundant vasiform tissue (dotted ducts) . 
Affinities. Little as I have to add to what was aheady known concern- 
ing the remarkable plants that constitute the type of this small order, that lit- 
tle is important as confirming the propriety of its separation. My own ob- 
servations on the structure of the wood shew that it is composed to a great 
extent of the dotted or vasiform tissue so prevalent in Ulmus. My invalua- 
ble friend, Mr. Griffith, in a letter dated Merqui, in Burmah, Dec. 28, 1834, 
has added the particulars enclosed in brackets. The order is too little known 
to afford materials for much speculation as to its affinities. Brown points out 
the striking resemblance of the branches and leaves, especially the abrupt ter- 
mination of the former, to Oleacese, especially Syringa ; but beyond this all 
further relation between these plants seems to cease. (Wall. Plant, as. rar. 
III. 14.) Mr. Griffith notices the conformity of the habit and inflorescence 
to Combretaceae ; and it is not impossible that it may turn out, when more 
known, to be an apetalous polyspermous form of the Rhamnal alliance, to 
which its definite perigynous stamens alternate with the sepals and valvate ca- 
lyx seem to approximate it. It must, however, be observed that its unisexual 
flowers, large perigjmous disk, and long exserted stamens, with a very wide 
connection, bring it close to Stilaginaceae, although the fruit is so difierent. 
Geography. Trees of Tropical India. 
Properties. Unknown. 
GENUS. 
Henslovia, Wall. 
TREWIACE^. 
Essential Character. — Floicers dioecious. Males : Sepals 3-4, with a valvate aesti- 
vation. Stamens numerous, arising from a common central point. Females: Calyx 
inferior, 3-4-toothed. Style 4-cleft. Drupe 4-celled with a single seed in each. Em- 
bryo inverted and amply furnished with albumen, Roxb. [Segments of the style reflexed, 
feathery within, Willd. Fruit berried, with 4 stones, each of which is one-seeded ; seeds 
pendulous without albumen, Gcertn .'] — A tree. Leaves opposite, exstipulate, entire. 
Flowers ; males in long racemes ; females axillary, solitary. 
Affinities. Here again seems to be the type of an unpublished order. 
It is clearly distinct from Urticacese and their allies, and yet it cannot be far 
removed from them. In the conflicting statements as to its real structure 
there is little further left, upon which we can seize. Barthng refers Tetragas- 
tris as a synonym to Hedwigia among Burseracese, I know not on what au- 
thority. Roxburgh considers it the same as this (FI. Ind. 3. 837.), and so 
does Adrien de Jussieu. Euphorh. 33. 
Geography. Natives of tropical India, 
Properties. Unknown. 
GENUS. 
Trewia, L. 
Tetragasiris, Ggertn. 
