252 BOTANY. 



moo Eastern type The first may be characterized as var. macrophyUum, 

 with large orbieular-obovate, glabrate Leaves, only in the young stale with 



an evamsccnt pubescence, li-2-i' long, 3- and often 5-nerved ; staminate 

 spikes unusually thick, with 4 or 5 short joints, each with 10-40, compara- 

 tively huge, 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. villosum (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. 



Piioradendron Californicum, Nutt. PI. 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 Mimosect, Larrea, and a 

 few other shrubs. 



Phoradendron juniperinum, Engelm. PI. 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. 



Akceutiiobium* Americanum, Nutt.; Engelm. PI. Lindh. 214. — Slender, 

 dichotomously and verticillately much branched, greenish-yellow; staminate 



• Akceuthobiom, Bicb.— Flowers dioecious, axillary ami terminal, Biogle or Be vera! from tin- Borne 

 axil; staminate dowers mostly 3- (rarely 2-, 4-, or 5-) parted; the axillary bads compressed, tin' terminal 

 ones globose; circular anthers ad nate to (ho lobes, 1-eelled, after opening saucer-shaped ; pollen-grains 



spinulose; pistillate flowers compressed, ovate, subsessile ; pedieel at length elongated, and at maturity 

 recurved ; berry tompressed, fleshy, dehiscent at the circnmscissilo base. Glabrous, jointed, shrubby 

 parasites of Conifers, of greenish or brownish color, with quadrangular branches and scale-like leaves 



connate into BheaMling cups ; flowers often crowded into apparent spikes or panicles, opening in spring, 

 summer, or autumn ; berries mature in (he second autumn, when they suddenly aud forcibly eject the 

 glutinous seeds to the distance of . several yards. 



