

ADJACENT TO HORTICULTURAL HALL. 35 
- De eS ee 
Retinospora Hoggii pendula, //oofes. Is a pendulous form, not unlike 
R. filifera, but more graceful and drooping in character, 
Retinospora pygmea, Veitch. Smallest-sized form of Retinospora ; bright, 
lively green color, and exceedingly ornamental. 
_  Salisburia. Male and female flowers on different plants; leaves fan-shaped, 
veined like ferns; deciduous. 
®  Salisburia adiantifolia, Sth. GINKGO, MAIDEN-HAIR TREE. (Ginkgo 
biloba, Linnaeus; Salisburia Ginkgo, Salisbury.) A tall, straight tree, with 
an elongated conical head, and a bark suggestive of some of the poplars. Not 
rare now in this country. From Japan, but hardy here. 
Sciadopitys. Male and female flowers on the same plant, but in different 
clusters. The most striking peculiarity is in the cones, where the scales are 
thin and leathery and have bracts adhering to them. Under each scale are 7 
to g free seeds. The single species in the Park is S. verticillata, Srebo/d 
and Zuccarint. UMBRELLA PINE. (/inus verticillata, Siebold; Taxus ver- 
ticillata, Thunberg.) It has strangely-whorled branches (encircling the stem) 
and leaves, the latter being 2 to 4 inches long and 2 lines wide, there being 
often 30 to 40 in a whorl around the stem. 
Sequoia. Male and female flowers in separate clusters but on the same 
tree. Cones small, oval, with 3 to § winged seeds under each scale. 
Sequoia gigantea, Zorrey. BiG TREE OF CALIFORNIA. (Wellingtonia 
gigantea, Lindley and others; Washingtonia gigantea, Kellogg.) From the 
Sierras of California at middle altitudes, where it grows nearly 300 feet high 
and 30 feet in diameter. It was formerly supposed that these trees were over 
3000 years old. It now appears probable that they are far short of this great 
age ; most likely not more than 1800 years old. It is in great danger of exter- 
mination from the destruction of the old trees for timber, and the killing of the 
young ones by fires made to clear the ground of underbrush and so allow the 
grass to grow for the bands of sheep which overrun the region. Not entirely 
hardy. 
Sequoia sempervirens, Zndlicher. CALIFORNIA REDWOOD. ( 7axodium 
sempervirens, Lambert; Taxodium Nutkaensis, Lambert.) Almost as large as 
the *‘ Bic TREE,” and even less hardy with us. Common about Monterey, Cal- 
ifornia. This species is being rapidly consumed for lumber, and it is to the 
Pacific coast what the White Pine is to this. 
Taxodium. Male and female flowers on the same branches but in different 
clusters. ‘ Fruit of several thick, shield-shaped scales united into a globular 
cone.’ Seeds 2 on the base of each scale. 
Taxodium distichum, Richard. BALD Cypress. (Cupressus Virginiana, 
Plukenet ; Cupressus disticha, Linnaeus.) A deciduous-leaved tree growing 
from Delaware southward, in low wet grounds. A most valuable timber, now 
coming into general use in finishing houses, etc. It attains a very large size, 
especially on the rich bottom-lands of the West and Southwest. Hardy here. 
Taxodium mucronatum, 7enore ; which is by some regarded as a mere 
variety of the above, is found in Mexico forming extended forests. To it the 
