Notes on the Absorption of Water by Aerial Organs of Plants. 433 
The recent experiments with Mesembrianthemum densum have con- 
firmed the previous results, viz., that the leaves are capable of absorbing 
water by means of these hairs. 
The various experiments with leaves of Crassula tomentosa, L., show 
that this plant is able to absorb a considerable amount of water through 
its leaves. 
Dr. Schonland's experiment with Anacampseros filamentosa Sims, in 
my opinion confirms rather than opposes the view that this plant does 
derive some benefit from the dew deposited on its leaves and stipules. 
EXPLANATION OF PLATE XXVIII. 
1. Mesembrianthemum densum, Haw. Plant, nat. size. 
2. Leaf (enlarged), showing the apical stellate hairs, each one inserted at its base in 
a cup. 
3. Diagrammatic view of apex of leaf. 
4. Tangential section through apex of young leaf, touching only one hair. 
h, hair ; e, epidermis, raised round the base of the hair and forming the cup ; 
c, chlorohyll- bearing tissue ; w, water-storing tissue. 
