Séance du i 3 Juin 1917 
517 
« Calyx 5-parted. Petals 5, hooded entire. Stamens 10, the filaments 
dilated at the base, free or somewhat monadelphous. Ovary 5-lobed 
depressed. Ovules 2 in each cell side by side or 4. Stigma capitate. Capsule 
glandular, 5-celled, splitting inwards at the apex, rarely indéhiscent. 
Seeds transversely wrinkled, tubercled. Herbs, usually with a woody root 
and trunk, erect or divaricate stems, simple or parted leaves, corymbose, 
bracted inflorescence ». 
He furtber describes II. tuberculatam in the following terms : 
« A perennial herb 30-40 cm. high, crisp-pubescent or glabrescent, 
stems ascending, much forked. Lower leaves and those of stérile branches 
obovate, or oblong-spathulate, tapering into a petiole, the upper one 
spathulate-linear, obtuse, ail from 5-12 mm. long, more or less crenate, 
wavy-margined. Ploivers scattered, subsessile, in forked cymes, calyx gla- 
brous, petals somewhat clawed,oblong,obtuse. FloicersOçiobvY to IVlarch ». 
The number of stamens appears to be very variable thus 
Mrs. Crowfoot in the illustration which she kindly gave us and 
which is reproduced iu the illustrations attached to this paper, 
depicts only seven. With reference to this it is interesting to 
note lhat Bentley and Trimen drew’a flover of Hata graveolens 
with eight stamens. 
Distribution. — The genus is found in the Mediterranean 
région while //. tuberculatam is known in Morocco, Algeria, 
Tunisia, Arabia-Petræa, Palestine, Persia and in Nubia i. e. in 
the Dongola Province of the Anglo-Egyptian Sudan where it lias 
been found by Mrs. Crowfoot and one of us. 
It has also been found at Tokar by Mr. Massey, Government 
Botanist, who kindly determined our specimen for us. It has also 
been recorded by Mrs. Hewison as growing near the Research 
Farm in Khartoum North while Muschler says thaï it is common 
in sandy deserts. 
Properties. — Its more important properties or assumed pro- 
perties may be classifîed into. 
1. Its odour. 
2. Its native use. 
3 . Its Dermatitis Venenata. 
Most people consider that its odour is disagreeable but here 
the personal équation cornes into play as some members of the 
laboratory staff consider the smell to be so agreeable that they 
hâve had some of the plants placed upon their writing tables. 
On the olher hand other members of the staff complain that the 
smell is very disagreeable and that it produces headache and 
even makes them fee sick. 
