ELM FAMILY 191 
Low OAK. (Q. acuminata, Sarg.). Tree resembling the chestnut in size 
and appearance of trunk. Leaves not lobed but with very coarse ser- 
rations, lance-shaped or broad lance-shaped. Most of our region. 
16. Q. Alexanderi, Britton. ALEXANDER’s OAK. Similar to the last; 
leaves pear-shaped. Cup cup-shaped, short stalked or not stalked. Ver- 
mont and westward. 
17. Q. prinus,L. (Fig. 7, pl. 29.) Rock CHESTNUT OAK. CHIN- 
QUAPIN. Large tree with ovate leaves broadest at outer third. Ser- 
rations coarse. Bark dark brown in broad ridges. Maine. 
18. Q. prinoides, Willd. (Fig. 10, pl. 29.) Scrus CHEestNut OAK. 
Shrub, from 2 to 12 ft. high; leaves resembling those of No. 14 but 
smaller (about 23 to 5 in. long, 2 to 3 wide), silky gray beneath. Maine 
and southward. 
19. Q. Michauxii, Nutt. (Fig. 9, pl. 29.) Basket Oak. Leaves 
oval with regular dentations, usually more or less silky beneath; acorn 
with a shallow cup, bordered by a stiff fringe, the acorn twice as high as 
the cup. Only in the most southern part of our area. (Del.). 
Sus-Orper IV.—URTICALES. Tue Nerrie ALLIANCE 
This section contains plants of widely different general aspect, 
some being among the highest of our trees, some shrubs, the great 
majority herbs with inconspicuous greenish flowers. The leaves 
in all cases have stipules (appendages at the base of the leaf stalk) 
but in all the trees and shrubs these appendages fall away with the 
early development of the leaves. In the herbaceous plants they 
are permanent. The flowers, like those of other plants of the 
great order of Juliflores are without petals, are small, greenish or 
yellow-green, with various forms of clusters. Ovary formed of 
1 or 2 carpels, one of which is usually sterile, with the calyx-like 
envelope below. 
reed with watery sap = 0.00. ). «. ULMACEAE 
iirees vith’ milky sap 2. 265%. w «w+ MORACEAE 
Be as ca ke Gg ee cae ye UE LOAC RAS 
Famity I.—ULMACEAE. Eitm Famity 
The family of Elms contains some of our loftiest and most 
beautiful trees. The species of the family are characterized by the 
inconspicuous flowers, the two forms of which may be upon the 
same tree or some of the flowers may contain both stamens and 
pistils. They occur along the course of the twig, not at its ex- 
tremity, forming little tufts (Fig. 5, pl. 30), or the pistillate (es- 
pecially in Celtis) may be solitary. Stamens as many as the lobes 
