
ADJACENT TO HORTICULTURAL HALL. 89 

lance-shaped leaves; flowers pink, in fragrant, flat-topped clusters terminating 
the branches; berries white. Hardy. Has some well-known varieties in 
cultivation. 
Daphne Gwenka, Siedo/d and Zuccarini. A twisted Japanese shrub, 2 to 
feet high; leaves lanceolate, less than an inch long and a third as wide; 
ac flowers appearing with the leaves about half an inch long; bark used in 
Japan as a rubefacient, flowers as a cathartic, febrifuge, and anthelmintic. 
Daphne Mezereum, Zinneus. A low branching shrub from Europe, with 
purple or sometimes white flowers in clusters on the branches of the previous 
. year, appearing before the smooth and lance-shaped leaves; berries red. 
Daphne pontica, Zivneus. PONTIC DAPHNE, TWIN-FLOWERED SPURGE. 
Shrub from Asia Minor, with greenish-yellow flowers, each partial stalk of 
which bears 2 flowers. 
Dirca. LEATHER-Woop, MoosE-Woop. Calyx simply tubular without 
any border; stamens 8, these and the style longer than the flower. 
Dirca palustris, Zinneus. Native shrub of wide geographical range, 
with very tough bark and white very soft wood; flowers yellow, emerging 
from dark, hairy scales before the leaves and in early spring; “ berry reddish.” 
Bush 4 to 8 feet high, with jointed branchlets. 
TILIACEZ. Linden Family. 
Trees with large leaves and somewhat fragrant yellow flowers in a cluster 
on a slender stalk to which a conspictous leaf-like appendage is united. 
Tilia argentea, De Candolle. Tree from Hungary, with scales inside the 
base of the petals; leaves white woolly underneath, and almost 4 times longer 
than the foot-stalks supporting them. Variety pendula of this species is in 
the Park. 
Tilia Americana, Zimn@us. AMERICAN LINDEN, BAsswoop. One of the 
finest of our native trees; flowers with a scale before the base of each petal; 
leaves rather smooth on either surface. 
Tilia Europza, Zinneus. EUROPEAN LINDEN. Flowers without scales 
on the base of the petals; heart-shaped leaves somewhat oblique, slightly 
downy on the under surface. A long-lived hardy tree in Europe, but short- 
lived and subject to insect enemies here. Tilia platyphylla of the gardens 
appears to be but a large-leaved form of this species. Of the European Lin- 
den there are several varieties, as aurea, laciniata, lutea, vitifolia. 
Tilia heterophylla, Ventenat. Wire LINDEN. ( Zilia alba, Michaux.) 
Flowers with scales in front of the stamens; leaves large, silvery white on the 
under surface. Most common along the mountains south of Pennsylvania. 
URTICACEZ. Nettle Family. 
Herbs, shrubs, or trees; without a corolla. Pistils and stamens usually sepa- 
rated (more or less distinctly associated in U/mus, Planera, and Celéis). 
Calyx not united to the single-seeded fruit. 


