
ADJACENT TO HORTICULTURAL HALL. 45 

wavy cut or lobed. Ranges from New England to Wisconsin and Kentucky. 
The variety oliveformis, A/ichaux, is another form, with smaller acorns in 
more shallow but still fringed cups; leaves vary greatly, from being entire to 
very deeply divided; branches may or may not be corky. 
Quercus Mongolica, Fischer. MONGOLIAN OAK. Annual-fruited ; leaves 
obovate, wedge-shaped towards the base, and towards the top somewhat wavy 
or lobed. 
* Quercus Muhlenbergii, Zxge/mann. YELLOW CHESTNUT OAK, YELLOW 
Oak. ( Quercus castanea, Muhlenberg; Quercus Prinus acuminata, Michaux.) 
Middle-sized tree, with leaves strikingly like those of the chestnut; annual- 
fruited ; bark pale and thin; wood very tough. Common with us. The 
original name (castanea) is now given to a Mexican oak. 
Quercus. myrtifolia, Wil/denow. MyrTLE-LEAVED OAK. (Quercus 
Phellos, var. arenaria, Chapman; Q. aquatica, var. myrtifolia, Alph. De 
Candolle.) From the Carolinas and Georgia. An evergreen shrub; leaves 
ovate to round, heart-shaped at base, 14 to 2 inches long, thick, margins rev- 
olute; acorn-cup % inch wide, shallow, its scales ovate-triangular and blunt- 
pointed. 
Quercus nigra, Zinne@us. BLACK-JACK, BARREN OAK. A small annual- 
fruited tree, with broadly wedge-shaped, somewhat 3- to 5-lobed leaves; the 
coarse scaly cup is top-shaped. (Quercus ferruginea, Michaux; Q. Mary- 
landica, Catesby ; and Q. guingueloba, Engelmann, are synonymes.) 
= Quercus palustris, Du Rot. SWAMP, SPANISH, or PIN OAK. A good- 
sized tree of the Black Oak group. Native to the Park. Biennial-fruited ; 
leaves deeply cleft, sinuses rounded, lobes divergent and acute; acorn over 
inch long, but cup very flat and shallow; limbs rather drooping. Timber 
is of middling quality only. 
Quercus Phellos, Zinneus. WiLtow OAK. An annual-fruited native 
Oak, 30 to 50 feet high, with thick, entire, willow-like leaves, by which it is 
well distinguished from all the other Oaks in our region. Low woods from 
New Jersey to Kentucky, but more common southward. @Q. Phellos cinerea 
is placed under Q. cinerea. 
* Quercus Prinus, Zinneus. CHESTNUT OAK. A branchy, middle- 
sized, annual-fruited native tree; leaves oblong, wavy, blunt-toothed, rounded 
at base, sharp at tip; acorn long and ina thick cup. Variety humilis, A/ar- 
shall. DWARF CHESTNUT OAK, or CHINQUAPIN OAK. (Q. Prinus, var. Chin- 
capin, Michaux the younger; Q. prinoides, Willdenow.) Has undulate, hardly 
sharp-toothed leaves; sessile acorns in moderately deep cups which have 
swollen scales. It is a mere shrub here, but becomes a tree 30 feet high west 
-of the Mississippi. Variety monticola, Michaux. Rock CHESTNUT OAK. 
(Quercus montana, Willdenow.) This Dr. Engelmann regards as a distinct 
species, and as the form on which the original Q. Prinus was founded by 
Linnzus. Bark of young trees smooth, of old, rough and furrowed; leaves 
thick, pale on lower surface; fruit with a deep rough cup and an acorn { to 
1% inches long and 1 inch thick. It is most common in the Southern 
mountains, 
Quercus pubescens, Zoddiges’ Catalogue. (Loudon, p. 1731, under Q. 
pedunculata, is not the pubescens of Willdenow. For the latter, see Loudon, 
p- 1736, where Q. danuginosa, Lambert, is given as a synonyme. ) 


