252 BOTANY. 
mon Eastern type. The first may be characterized as var. macrophyllum, 
with large orbicular-obovate, glabrate leaves, only in the young state with 
an evanescent pubescence, 14-24’ long, 3- and often 5-nerved ; staminate 
spikes unusually thick, with 4 or 5 short joints, each with 10-40, compara- 
tively large, pubescent flowers—They grow on soft woods (Ash, Willow, 
Poplar, Sycamore, and Sapindus) on the Gila and Bonita Rivers, and 
extend into Southern California, G. K. Gilbert, Dr. Rothrock. 
Var. vitLosum (Phor. villosum, Nutt.), with woolly, obovate, and var. 
ORBICULATUM, with rounded, pubescent leaves, are found on hard woods, 
principally on Oaks, in Oregon, California, Arizona, and southeastward. 
On the mountains about Camp Apache, Arizona, they grow on different 
varieties of Quercus undulata. 
Puorapenpron Cauirornicum, Nutt. Pl. Gambel. p. 185.—Slender, 
terete, much branched, leafless stems, 1-2° long, bearing, in the axils of 
the opposite, connate, acute, spreading scales, numerous short, pubescent, 
1- or few-jointed spikes, each joint with 2-6 flowers; staminate flowers 
with oblong anthers, the cells opening longitudinally.—Arizona and South- 
ern California, G. K. Gilbert, Dr. Rothrock, on Mimosee, Larrea, and a 
few other shrubs. 
PHORADENDRON JUNIPERINUM, Engelm. Pl. Fendl. p. 58.—Half a foot 
to a span high, densely branched; small, obtusish leaf-scales ciliate ; stam- 
inate spikes very short, mostly with a single 6-8-flowered joint, pistillate 
ones with only two opposite flowers —Common on different species of Juniper 
throughout Arizona and in the adjacent districts; collected by all the differ- 
ent Expeditions. The short joints are so fragile that the dried specimens 
easily break up. 
Arceutnosium* Americanum, Nutt.; Engelm. Pl. Lindh. 214.—Slender, 
dichotomously and verticillately much branched, greenish-yellow; staminate 
* ARCEUTHOBIUM, Bieb.—Flowers diwcious, axillary and terminal, single or several from the: sam 
= staminate flowers mostly 3- (rarely 2-, 4-, or 5-) parted ; the axillary buds compressed, the vebailonl 
es globose ; ve anthers adnate the ae 1-celled, after opening saucer-shaped ; pollen-grains 
pe 3} pistillate flowers ovate, subsessile ; pedicel at length elongated, and at maturity 
recurved ; berry compressed, fleshy, met ye the circumscissile base. Glabrous, jointed, shrubby 
parasites of Conifers, of greenish or brownish color, with quadrangular branches and scale-like leaves 
connate into sheathing cups; flowers often crowded into apparent spikes or panicles, opening in spring, 
sumer, or autumn ; berries mature in the second autumn, when they suddenly and forcibly eject the 
glutinous seeds to the distance of several yards. 
