458 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
5. PENIOCEREUS Britt. & Rose. 
1. Peniocereus greggii (Engelm.) Britt. & Rose, Contr. U. S. Nat. Herb. 12: 428, 
1909. 
Cereus greggti Engelm. in Wisliz. Mem. North. Mex. 102. 1848. 
Type Locauty: “North and south of Chihuahua.”’ 
Rance: Southern New Mexico and Arizona to Chihuahua and Sonora. 
New Mexico: Tortugas Mountain (Mrs. Z. 0. Wooton). Dry plains and hills, in 
the Lower Sonoran Zone. 
Reported as collected somewhere in New Mexico in 1891 by W. H. Evans. 
This species is apparently rare. The stems are slender, 20 to 40 cm. high or more, 
about 2 cm, in diameter, mostly 4-angled, with very small, stout spines 1 to 2 mm. 
long from swollen bases. The plant usually has one or two ascending stems from a 
large tuberous root. The flowers are about 15 cm. long, with a slender tube and white 
funnelform perianth; they open at dusk and remain open only during the night. 
Order 36. THYMELAEALES. 
98. ELAEAGNACEAE. Oleaster Family. 
Shrubs or trees with silvery lepidote or stellate pubescence; leaves opposite or 
alternate, the blades entire; flowers perfect, polygamous, or dicecious, usually clus- 
tered in the axils of the branches of the present or previous year; calyx of 4 or some- 
times 2 sepals surmounting the hypanthium; petals wanting; stamens 4 or 8 on the 
tube of the hypanthium; pistil simple, becoming a drupelike fruit. 
Elaeagnus angustifolia, the oleaster, is cultivated in a number of places in the 
State. It is especially attractive because of the sweet odor of its flowers. 
1. LEPARGYREA Raf. BurraLo BERRY 
KEY TO THE SPECIES. 
Leaves ovate or oval, green above; stems not spiny; low shrub.... 1. ZL. canadensis, 
Leaves oblong, silvery on both surfaces; stems spiny; tall treelike 
Shrub............2 020 -ce eee eee ee eee eee eee ec eee ee ee 2. L. argentea, 
1. Lepargyrea canadensis (L.) Greene, Pittonia 2: 122. 1890. 
Iippophae canadensis L. Sp. Pl. 1024. 1753. 
Shepherdia canadensis Nutt. Gen. Pl. 2: 240. 1818, 
TYPE Locauity: ‘‘ Habitat in Canada.”’ 
RanaeE: Alaska and Newfoundland to Oregon, New Mexico, and New York. 
New Mexico: Brazos Canyon; Santa Fe Mountains. Damp woods, in the Canadian 
Zone. 
A low shrub less than a meter high, growing in deep damp woods, 
2. Lepargyrea argentea (Pursh) Greene, Pittonia 2: 122. 1890. 
Hippophae argentea Pursh, Fl. Amer. Sept. 115, 1814. 
Shepherdia argentea Nutt. Gen, Pl. 2: 240. 1818. 
TYPE Locauity: ‘‘On the banks of the Missourt.’’ 
RanGE: British America to Kansas and New Mexico. 
New Mexico: San Juan Valley. Along streams, in the Upper Sonoran Zone, 
A tall shrub, usually about 3 meters high, with small, silvery leaves. The small, 
bright red berries are borne in great profusion. They havea pleasant acid flavor, 
similar to that of red currants, and are gathered for making jellies, 
