216 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
tion of a number of adventitious buds, and rre probably of a purely 
pathological character. 
The same author * * * § gives an account of the different views hitherto 
held regarding the morphology of the flower in the same species. 
Hairs on the Sepals of the Santalaceae.f — M. P. van Tieghem calls 
attention to the remarkable fact that the tuft of hairs which springs 
from the sepals behind the stamens in plants belonging to this order, 
is not trichomic, but is of endogenous origin, springing from large 
exodermal cells. This is well seen in Thesium Jmmifusum, and is general 
throughout the order ; but in the allied families, Arionacem and Schoep- 
fiaceas, the hairs, though occupying the same position, have an ordinary 
epidermal origin. 
Phanerogams with an Ovule destitute of Nucellus.j; — M. P. van 
Tieghem gives further details of this group of Phanerogams (or of 
Dicotyledones), the Inovulat^: or Loranthineae, characterised by the 
absence of any true ovule, and composed of ten orders, the Nuytsiaceae, 
Elytranthaceae, Dendrophthoaceae, Treubellaceae, Loranthaceae, Arceu- 
thobiaceoe, Helosaceae, Grinalloaceie, Yiscaceae, and Balanophoracefe. Of 
these orders the first five, comprising the Loranthales, have hermaphro- 
dite and dichlamydeous, the remaining five, the Vise ales, unisexual and 
apetalous flowers. The greater number are clilorophyllaceous parasites ; 
the Helosacem and Balanophoraceae are non-chlorophyllaceous root- 
parasites. 
Closely related to the Inovulatae, and forming a border-land between 
them and those endowed with perfect ovules, are a group of orders 
•which the author names the Innucellatas, or Santalinese , in which the 
ovule is reduced, not to a nucellus, as stated by previous authors, but to 
the funicle or ovular leaf not differentiated into petiole and lamina; 
the nucellus and the integument being both entirely wanting. To this 
group belong nine orders, viz. : — the Santalaceae, Arionaceie, Schcepfiacese, 
Sarcophytacese, Myzodendraceae, Opiliaceae, Olacacese, Aptandraceie, and 
Harmandiaceae, the characters of each of which are described in detail. 
Tn all of them the mother-cell of the endosperm and of the oosphere 
(improperly called the embryo-sac), originates directly beneath the epi- 
derm in the cortex of the foliar leaf, without this cortex becoming 
elevated above the surface and forming the emergence known as the 
nucellus. These nine orders comprise about fifty genera, five of them 
mew. The last-named three orders possess a corolla, and constitute 
the alliance of the Olacales ; the remaining seven, which are apetalous, 
make up the alliance of the Santalales. They all agree with the 
Loranthineae in the ripe fruit containing no true seed. 
The Anthobolaceae, comprising four genera, are distinguished from 
the above-named orders in possessing a nucellus, but no integument ; 
they constitute a new group, the Integminat-e or Anthobolinea:. 
Winged Fruits and Seeds. § — Dr. C. von Wahl classifies the contri- 
vances for assisting in the carriage of seeds or fruits through the air by 
* Op. cit., x. (1896) pp. 7-8, 13-5 (1 pi.). 
f Journ. de Bot. (Morot), xi. (1897) pp. 41-5. 
~ X Bull. Soc. Bot. France, xliii. (1896) pp. 543-77 ; Comptes Bendus, exxiv. 
<1897) pp. 655-60, 723-8, 803-5. Cf. this Journal, 1896, p. 206. 
§ Biblioth. Bot., Heft 40, 1897, 25 pp. and 5 pis. 
