MISTLETOE FAMILY. 535 
About 2t genera and 500 species, widely distributed; most abundant in tropical regions. 
Leaves scale-like, united at the base; anthers 1-celled; berry peduncled. 1. Razoumofskya. 
Leaves thick, flat; anthers 2-celled; berry sessile. 2. Phoradendron. 
1. RAZOUMOFSKYA Hoffm. Hort. Mosq. 1808. 
[ARCEUTHOBIUM Bieb. Fl. Taur. 3: 629. 1819. ] 
Small or minute fleshy glabrous plants, parasitic on the branches of coniferous trees, 
their branches 4-angled, and leaves reduced to opposite connate scales. Flowers dioecious, 
not bracted, solitary or several together in the axils of the scales. Staminate flowers witha 
2-5-parted calyx and usually an equal number of stamens, the anthers sessile on the seg- 
ments. Pistillate flowers with the ovary adnate to the tube of the calyx, the calyx-limb 2- 
parted. Disk present in both kinds of flowers. Berry fleshy, ovoid, more or less flattened, 
borne on a short somewhat recurved peduncle. Embryo enclosed in the copious endosperm. 
{In honor of Alexis Razoumofski, Russian botanist. ] 
About 10 species. Besides the following, 7 or 8 others occur in western North America and 
Mexico, 2 in Europe and Asia. 
1. Razoumofskya pusilla (Peck) Kuntze. 
Small Mistletoe. (Fig. 1271.) 
Arceuthobium pusillum Peck, Rep. N. Y. State Mus. 
25:69. 1873. 
Arceuthobium minutum Engelm. Bull. Torr. Club, 2: 
. Without description. 1871. 
Razoumofskya pusilla Kuntze, Rev. Gen, Pl. 587. 1891. 
Plant inconspicuous, stems 2//-10’’ long, nearly te- 
rete when fresh, somewhat 4-angled when dry, sim- 
ple or sparingly branched, greenish-brown, slender. 
Scales suborbicular, appressed, obtuse, about 14/’ 
wide, connate at the base; flowers strictly dioecious 
(the staminate and pistillate plants sometimes on dif- 
ferent trees), solitary in most of the axils, longer 
than the scales; berry ovoid-oblong, acute, about 1// 
long, nodding on a slightly exserted peduncle; seeds 
enclosed in a viscid mucus. 
On twigs of spruces, New Hampshire, northern New 
York and the Pocono region of Pennsylvania. June. 
2. PHORADENDRON Nutt. Journ. Acad. Phila. (II.) 1: 185. 1847-50. 
Shrubs, parasitic on trees, with opposite coriaceous flat entire or undulate faintly nerved 
leaves, terete usually jointed and brittle twigs, and dioecious axillary spicate bracted small 
flowers, solitary or several in the axil of each bract. Staminate flowers with a 3-lobed (rarely 
2-4-lobed) globose or ovoid calyx, bearing a sessile transversely 2-celled anther at the base of 
each lobe. Pistillate howers with a similar calyx adnate to the ovoid inferior ovary. Style 
short, obtuse or capitate. Fruita sessile ovoid or globose fleshy berry. Endosperm copious. 
[Greek, tree-thief, from its parasitic habit. ] 
About 80 species, all American. Besides the following, 5 or 6others occur in the Western States. 
1. Phoradendron flavéscens (Pursh) 
Nutt. American Mistletoe. (Fig. 1272.) 
Viscum flavescens Pursh, Fl. Am. Sept. 114. 1814. 
Phoradendron flavescens Nutt.; A. Gray, Man. Ed. 
2, 383. 1856. 
A branching glabrous or slightly pubescent 
shrub, the twigs rather stout, terete, brittle at 
the base. Leaves oblong or obovate, rounded 
at the apex, narrowed into short petioles, 3-5- 
nerved, entire, 1/-2’ long, 5’’-10’’ wide, dark 
green, coriaceous; petioles 1//-4/’ long; spikes 
solitary, or 2 or 3 together in the axils, linear, 
shorter than the leaves; berry globose, white, 
about 2’’ in diameter 
Parasitic on deciduous leaved trees, notably on 
the Tupelo and Red Maple, central New Jersey to 
Ohio, Indiana and Missouri, south to Florida and 
Texas. May-July. 
