POSSIBLE USE OF ESSENTIAL OILS IN PLANT LIFE 101 
serta, antheris lineari- oblongis, capsula brevi sateaiioaeciiaa cai 
verrucis elevatis in pilum sat elongatum semel dichotomum abeun- 
tibus onusta. 
Folia 0-5-0'8 cm. long., 0:15-0.25 cm. lat.; glandule immerse 
utrinsecus creberrime. Panicule adusque 10-0 cm. long. ; harum 
0°15-0°35 cm. long. Pedicelli + 0°5 cm. long. Calyx 
florescens 0-4 cm. long., 0°6 cm. diam.; lobi 0°25 em. long. et 
0-3-0'35 cm. lat., obtusissimi; calyx frutescens 1:0 cm. diam.; 
lobi antici 0°85 ¢ m. long., 0°5 cm. lat.; postici 0-2 cm. long., 
0-4 cm. lat. Corolle extus puberule tubus 0°15 cm. long.; labii 
postici lobi circa 0°16 cm. long. et 0-2 cm. lat.; antici — inter- 
medius 0°33 cm. long. Filamenta 0-3 cm. long. 
crassata; anthere modo 0:07 cm. lat. Stylus pe giabor, 
0:45 cm. long, mae monosperma, circa 0°25 cm. diam., hujus 
verruce circa 0°1 ¢ 
The chief pal, at of this are the very small toothed ——- 
the small deep-blue flowering calyx, the narrow anthers, and wa 
fruit. The froiting calyx is also a aay seemed than is eri 
C. angustifolia Turez., and, so far concerns the specimens 
examined by me, there is greater differense in the size of its anti- 
cous and posticous lobes. 
A plant in the Kew Herbarium, collected by the Elder Expedi- 
tion and penal oe under the name C. Turczaninowti F. Muell., 
agrees aes, 8 with t 
e fruit has been aeskabad from a specimen which Dr. Pritzel 
dly ‘tant me from Berlin. It was collected at Menzies by Dr. 
Dil (No. 5141). 
(To be continued.) 
THE POSSIBLE USE OF ESSENTIAL OILS IN 
PLANT LIFE. 
By Grorce Henpersoy, M.D., F.L.S. 
Everysopy knows that moisture in the air tends to prevent 
frost at night, “os a is not always realized that moist air, even 
when clear and w there me no clouds, acts in the same way, 
and ca sete nthe the gr . 
» experimenting o ee subject (see his Fragments of 
Sdaiea, (1871), p. = found ‘hat infinitesimal quantities of essen- 
tial oils in the air increased enormously its power of absorbing heat 
rays of low secisanacs I am n ia aware that anyone has sugge 
that this fact serves any useful t life, but it seems 
to me that in this way these oils may often prevent injury from 
