TITHYMALUS BRAUNI. 295 
Trichomanes radicans, Sw.  Leaf-cells forming an ovenchyma, and 
but slightly smaller than those of Hymenophyllum Wilsoni. 
Thus, while H. Tunbridgense is easily distinguishable by the leaf-cells 
from the other two plants, there is scarcely sufficient difference between 
the cells in H. Wilsoni and Trichomanes radicans o afford a dia- 
nosis. 
Besides the difference of the leaf-cells in the two species of Hyme- 
nophyllum, I may add that the tissue-cells of the involucres afford an 
equally good diagnostic between these two plants; for these cells are 
much larger in H. Wilsoni than in H. Tunbridgense. 
Edenbridge, September 15, 1863. | 
eos accentu ipm 
TITHYMALUS BRAUNI, ÀA NEW EUPHORBIACEA FROM 
ABYSSIN 
Tithymalus Brauni (n. sp., habitu similis Tith. Chilensi, K. G.); 
T. radice crassa, lignosa, simplici ; caudice valde incrassato, phyllopo- 
diis processiformibus ; ramis crassis, brevibus ; umbellis radiis binis, 
foliosis ; foliis glaucis, sessilibus, semiamplexicaulibus, ovato-oblongis, 
acutiusculis, mucronatis, floralibus conformibus ; involucris peduncu- 
latis, margine fimbriato-laciniatis, glandulis 1-3-appendiculatis; appen- 
dicibus erectis, luteis, ochream 11-9 millim. longam referentibus ; cap- 
sula glaberrima, coccis globosis; semine trigono, basi obtuso, apice 
acuto, grosse tuberculato. 
Hab. in Abyssinia, 3300'-3500' s. m. s. pro 
leg. Schimper. 
pe Gólleb, 25 Aug. 1854, 
ScHWEINFURTH. 
1 5 agatyci- piii mete 
ON TWO FORMS OF PLANTS GROWING UNDER THE 
SAME CONDITIONS. 
By Dr. Jous EDWARD Gray, F.R.S. 
purple variety of Anemone nemorosa 
which grew in the same wood 
the normal white form. This 
ingled in the same tufts, 
Some time ago I described a 
(Ann. Nat. Hist. 3rd ser. vii. p. 422), 
near to, but generally in distinct tufts from, 
year, a& Watfield, I saw the two forms interm 
