5 2 
The Ohio Naturalist. 
[Vol. VII, No. 3, 
leaf. On the hairs of Solanum carolinense there are usually four 
spreading points and a single erect one, but the number of points 
on the other Solanums, the Crotons and on Lepargyraea vary 
greatly. On these plants we find the more typical forms of true 
stellate hairs. 
The second type of stellate pubescence is shown in the figures 
of Hicoria minima (Figs. 11, 12) Helianthemum canadense (Figs. 
22, 23) and Viburnum alnifolium (Figs. 25, 26). In these the 
single hairs are arranged from a common point on the surface and 
spread in many directions. Hairs arranged in this manner are 
called stellate tufts. 
The hairs of Hicoria minima are rather heavy, and there are 
very seldom more than four in the tuft. A great many of the 
tufts have only two hairs. The single hairs of the Helianthe¬ 
mum are barbed and a little more slender than those of the 
hickory. The number of hairs in a tuft varies but tufts made 
up of from six to fifteen are the most common. The single hairs 
of Viburnum alnifolium are very long and slender, and being 
very much twisted and intertwined give a true tomentose cov¬ 
ering to the leaf. The number of hairs in a tuft varies, but most 
frequently there are from ten to twenty. 
The Lepargyraea has peltate scales along with the stellate 
hairs. In fact the transition is very gradual, and there are some 
intermediate forms which could be placed either with the scales 
or the hairs. Usually though they fall into three rather distinct 
divisions: the brown scale (Fig. 1), the white scale (Fig. 2), and 
and the white stellate hair (Fig. 3). The stellate hairs of Hicoria 
minima and other species are also found associated with scales 
(Figs. 8, 9, 10), but the scales are entirely different from those of 
Lepargyraea. There is also a sharp distinction between the 
hairs and the scales of the hickory, no transition forms being pres¬ 
ent. The scales of Hicoria minima are rather large, yellowish 
green or brown in color and attached to the leaf by a very short 
stalk. Those of Hicoria alba are smaller and brown in color, and 
those of Chamaedaphne calyculata are also of the same type. 
They are of a typical peltate shape and are multicellular. 
Ohio Plants Which Have Stellate Pubescence. 
Juglans cinerea L., leaves stellate tufted. 
Hicoria ovata (Mill.) Britt., twigs stellate tufted, leaves 
finely stellate tufted. 
Hicoria laciniosa (Mx.f.) Sarg., leaves stellate tufted. 
Hicoria glabra (Mill.) Britt., leaves stellate tufted, only 
slightly above. 
Hicoria alba (L.) Britt., twigs stellate tufted, leaves tomen- 
tose-stellate tufted. 
