CROWBERRY FAMILY 381 
Shrubs and trees. 
Fruit of two long winged samaras; veins of the leaves 
radiate from the end of the leaf-stem . . ACERACEAE 
Fruit a much inflated, bladder-like capsule; veins of the 
leaves diverging from a mid-vein . STAPHYLEACEAE 
Fruit a berry-like drupe; veins of leaves diverging from a 
mid-vein. 
Flowers in terminal, generally dense clusters 
. . ANACARDIACEAE 
Flowers in axillary, generally few-flowered clusters; 
leaves alternate. 3) a! oles 4 ERICACEAR 
Fruit in a 2- to 5-celled pod, leaves opposite ‘CELASTRACEAE 
Fruit a nut enclosed in a spiny bur-like capsule. Leaflets 
radiating from the leaf-stem . . HIPPOCASTANACEAE 
Fruit a 3-seeded berry, leaves pinnate. . SAPINDACEAE 
Famity I—EMPETRACEAE. Crowserry FAMILY 
Low spreading plants, with slender woody stems, which are 
freely branching and covered with small narrow leaves. Flowers 
inconspicuous, of two kinds, pistillate and staminate, both on the 
same plant or the two on separate plants. Berry black or red with 
several hard nutlets within. 
1. EMPETRUM, L. 
Our only species a branching and depressed woody plant with slender 
stems and thickly scattered, small, linear leaves. Flowers having both 
calyx and corolla or with calyx only; the pistils and stamens in different 
flowers on the same plant or on different plants. Calyx of 2 or 3, usually 
3, sepals. Stamens of the staminate flowers 3. Flowers toward the sum- 
mit of the slender stem in the axils of the leaves. Corolla present. 
E, nigrum, L. (Fig. 9, pl. 89.) Biack Crowserry. A small pros- 
trate shrub growing on White Mountains and other elevated places and 
on northern part of our coast. 
2. COREMA, Don. 
Corolla absent, flowers in terminal clusters. Otherwise resembling 
Empetrum. 
C. Conradii, Torr. (Fig. 10, pl. 89.) Conrap’s CrowsErry. Low 
bushy tufted shrub, 1 ft. high. In pine barrens. 
