BROAD-LEAVED EVERGREENS 365 



on the young branchlets, the staminate in 3-7-flowered cymes, the pistillate 

 solitary : fruits globose, about ^ inch thick, black, on stalks }/Q-}/i inch long. 

 Flowers in May and June; fruits ripening in October and remaining during 

 the winter. Japan. — Introduced to Europe in 18G4, to America in 1875 by 

 Thomas Hogg. Hardy in southern New York and southward. The var. 

 microphylla, Maxim., with smaller elliptic to elliptic-oblong leaves ^f 

 inch long is hardier and stands the average winter at the Arnold Arboretum, 

 but in severe winters it is more or less injured. 



A shrub of similar appearance is I. jmnnanensis, Franch., from western 

 China, but it has red fruit, ovate to ovate-oblong leaves, and pubescent 

 branchlets. The var. gentilis, Loes., differs chiefly in its glabrous 

 branchlets. — Introduced in 1911 from central China by E. H. Wilson to the 

 Arnold Arboretum, where it has proved fairly hardy in sheltered positions. 

 It will be a desirable addition to the evergreen shrubs and is superior to 

 Ilex crenata on account of the showier fruit, but it is not yet in the trade. 



I. glabra, Gray (Prinos glaber, L.). Inkberry. Winterberry. Shrub to 

 6 or 7 feet tall with upright slender branches; young branchlets puberulous: 

 leaves obovate to oblanceolate, acute to obtusish, cuneate at base, ^-2 

 inches long, with a few shallow obtuse teeth near the apex or occasionally 

 entire, dark green and lustrous above, light green beneath, glabrous : flowers 

 axillary on the young branchlets, the staminate in several-flowered cymes 

 on slender peduncles, the pistillate ones often solitary, 5-8-merous: fruit 

 globose, 3^ inch across, black, short-stalked. Flowers in June; fruits late in 

 autumn and remaining during the winter. Nova Scotia to Florida, and 

 Louisiana, near the coast. — Introduced in 1759 to Great Britain. Hardy 

 as far north as New England and southern Ontario. 



ERICACEAE. HEATH FAMILY 



RHODODENDRON, L. (Plates XLV-XLVII) 



Evergreen or deciduous shrubs, rarely trees; winter-buds scaly, usually 

 large and conspicuous: leaves alternate, short-petioled, entire, exstipulate: 

 flowers pediceled, in terminal umbel-like racemes, rarely lateral, sometimes 

 in few-flowered clusters or solitary; caljTC 5-parted, often very small; corolla 

 rotate, campanulate or funnel-shaped, sometimes tubular, with 5- or some- 

 times 6-10-lobed limb; stamens 5-10, or sometimes more; anthers opening 

 with pores at the apex; ovary 5-celled, or sometimes 6-10-celled; style slender, 

 with capitate stigma: fruit a capsule separating into 5-10 valves; seeds 

 numerous, small. (Name derived from Greek rhodon, rose, and dendron, tree, 

 but the rhododendron of the ancient Greek was Nerium.) — About 400 species, 

 chiefly in the temperate regions of the northern hemisphere, also on the 



