260 
IOWA ACADEMY OF SCIENCE Vor. XXIX, 1922 
Hypocotyl slightly pubescent. Early scales upon the stem, small. 
First leaf 3/8 of an inch in length; lower surface puberulent, 
stipules green, fugacious ; upper surface puberulent. Second leaf 
bright green below, prominently veined, coarsely dentate; upper 
surface puberulent, margin slightly hairy. Third leaf much like 
the second; coarsely dentate. Young shoots of rusty color. 
Trichomes. The hairs upon the stem are numerous, simple, 
slender, sharp-pointed, 1/100 to 1/50 of an inch in length. 
Upon the stipules are simple hairs (from 1/75 to 1/60 inch) 
, and numerous glandular hairs composed of three to seven cells; 
the terminal cells are in groups of two or three; these with some 
of the preceding simple cells, have a yellowish content; the basal 
cells are colorless. 
Fig. 5. Maclura pomifera, seedling with hairs (a) from leaf edge, (b) from stem 
Drawn by C. M. King 
Madura pomifera. (Raf.) Schneider. Osage Orange. 
The seedling of osage orange studies was brought in July 10 
from locality of Ames. 
The two cotyledons, thick, oval, obtuse, entire ; petiole .short ; 
shining dark green above, paler beneath, pinnately nerved. 
Stem erect, terete, herbaceous, becoming woody; covered with 
short hairs ; first internode one inch in length. First pair of 
leaves lanceolate, entire acuminate, bearing minute hairs ; pin- 
nately nerved. Petioles hairy, short, channelled. Stipules acute, 
hairy. 
