i8o 
The Ohio Naturalist. 
[Vol. VII, No. 8, 
Corylus americana (Fig. 12) has glandular emergences of the 
multi-cellular type. The stalks show from five to ten rows of 
cells on one side and the glandular heads are also multi-cellular. 
Cvpripedium reginae (Fig. 11) has multi-cellular glandular hairs 
consisting of three stalk cells and a head cell. The basal cell 
is rather large and extends below the surface of the epidermis. 
The top or head cell is enlarged and rounded in shape with a slight 
depression on the top. The four cells each show large nuclei 
and the head cell is filled w r ith granular cytoplasm. Juglans 
has glandular hairs which have multi-cellular heads. The cells 
are formed by longitudinal divisions and a plate of cells is formed. 
The stinging hairs of Urtica dioica (Fig. 10) are glandular, but 
of a different type. The hair consists of an enlarged multi¬ 
cellular base and a single-celled top. This hair gives our formic 
acid on being broken. 
The following lists represent the Ohio plants having the var¬ 
ious types of glands considered: 
Punctate Leaves. 
Polygonum incarnatum Ell. 
lapathifolium L. 
pennsylvanicum L. 
persicaria L. 
careyi Olney. 
hydropiperoides Michx. 
hydropiper L. 
punctatum Ell. 
virginianum L. 
scandens L. 
sagittatum L. 
arifolium L. 
Amaranthus hybridus L. 
retroflexus L. 
spinosus L. 
blitoides S. Wats, 
graecizans L. 
Acnida tamariscina tuberculata 
(Moq.) Uline and Bray. 
Magnolia acuminata L. 
Liriodendron tulipifera L. 
Caltha palustris L, 
Psoralea pedunculata (Mill.) Vail. 
Psoralea onobrychis Nutt. 
Amorpha fruticosa L. 
Kuhnisterapurpurea (Vent:) MacM. 
Xanthoxylum americanum Mill. 
Ptelea trifoliata L. 
Polygala cruciata L. 
verticillata L. 
“ ambigua Nutt. 
“ incarnata L. 
Polygala viridescens L. 
“ senega L. 
“ polygama Walt. 
“ paucifolia Willd. 
Ascyrum hypericoides L. 
Hypericum ascyron L. 
kalmianum L. 
prolificum L. 
adpressum Bart, 
spaerocarpum Michx. 
ellipticum Hook, 
virgatum Lam. 
maculatum Walt, 
perforatum L. 
subpetiolatum Bickn. 
boreale (Britt.) Bickn 
mutilum L. 
gvmnanthum Engelm. 
and Gray, 
majus (Gr.) Britt, 
drummondii (Grew and 
Hook.) T. and G. 
Triadenum virginicum (L.) Raf. 
Lysimachia quadrifolia L. 
terrestris (L.) B. S. P. 
nummularia L. 
Naumbergia thyrsiflora (L.) Duby. 
Grindelia squarrosa (Pursh )Dunal. 
Euthamia graminifolia (L.) Nutt. 
caroliniana (L.) Greene. 
Boebera papposa (Vent.) Rydb. 
