504 FOREST CULTURE AND 
Nageia (Podocarpus) Thunbergi, Hooker.—South 
Africa. Superior in the quality of its wood to N. 
pruinosa, E. Meyer, and even N. elongata; it is 
bright yellow, fine-grained and very handsome when 
polished (Dr. Pappe). 
Nyssa multiflora, Wangenheim.—FEastern States of 
North America, where it is called the Forest Tupelo 
or Black Gum-tree. Wood tough, firm, fine-grained, 
but very unwedgeable (Dr. Asa Gray). It is used for 
turners’ work. Leaves of deep crimson hue in Au- 
tumn. The acidulous fruits are edible. 
Nyssa uniflora, Walter.—Eastern States of North 
America. The Swamp Tupelo. Wood soft, that of 
the roots very light and spongy, thus used for corks 
(Dr. Asa Gray). Attains a height of 80 feet. The 
mucilaginous fruits are edible. 
Opuntia Dillenii, Candolle.—Central America. A 
Tuna-like Cactus, serving for uninflammable hedges, 
and perhaps also for the rearing of the Coccus Cacti. 
It is particularly eligible for barren land. 
Opuntia Missouriensis, Candolle.—From Nebraska 
to New Mexico. Mr. Meehan found this cactus coy- 
ered with the cochineal coccus, and points to the fact 
that this insect will live through the intense cold 
which characterizes the Rocky Mountains to the Col- 
orado regions. 
Opuntia Rafinesquii, Engelmann.—North America. 
The most northern of all species, extending to Lake 
Michigan. 
Osmitopsis asteriscoides, Cassini.—South Africa. A 
camphor-scented shrub, much in use there for medic- 
inal purposes (Dr. Pappe). 
Oxalis esculenta, Otto and Dietrich.—Mexico, there 
