KAZOT3MOFSKYA LORANTHACEJE 609 



6-18-flowered : anthers transverse, opening by pores: pistillate spikes 2- 

 flowered : berries reddish. On Libocedrus decurrens, southern Oregon to 

 California. 



2 RAZOUMOFSKYA. Hoff. Hort. Mosq. 1808. 

 ARCEUTHOBIUM Bie.b.. 1819. 



Small fleshy plants parasitic on the branches of coniferous trees, 

 with 4-angled jointed branches, opposite connate scales in the 

 place of leaves and small naked dioecious flowers solitary or sev- 

 eral together in the axils of the scales. Starninate flowers with a 

 2-5-parted calyx and usually an equal number of stamens, the 

 anthers sessile on the segments. Pistillate flowers with the calyx- 

 limb 2-parted. Fruit a fleshy more or less flattened berry borne 

 on a short somewhat recurved peduncle. Embryo enclosed in 

 copious albumen. 



R. Americana Kuntze Rev. Gen. ii, 587. Arceuthobium Americanum 

 Nutt. Greenish-yellow, glabrous : stems slender, dichotomously or verticil- 

 lately much branched: staminate plants 2-4 inches long with the flowers 

 on terminal peduncle-like joints, paniculate, a line broad or more, with 

 ovate-orbicular acutish lobes: pistillate plant much smaller, with the 

 flowers a line long or less : berries 2 lines long. On Pinus contorta, Brit. 

 Columbia to California and Colorado. 



R. Donglasii Kuntze 1. c. Arceuthobium Douglasii Engelm. Greenish 

 yellow: stems slender, 3-12 lines high, much branched but not verticillate- 

 ly : spikes short, mostly 5-flowered : staminate flowers less than a line wide, 

 with round-ovate acntish lobes, axillary, forming simple or compound 

 spikes : accessory branch lets of fruiting plant flower- bearing : berries 2> 

 lines long. On Pseudotsuga Douglasii, Idaho to California and New Mex. 



Var. abietinum Greene Fl. Fr. 341. Fertile plants larger 1-3 inch- 

 es high, the sterile smaller with spreading or recurved branchlets: fruit 

 smaller. On Abies concolor, Oregon and California. 



R. occidentalis Kuntze 1. c. Arceuthobium occidentals Engelm. 

 Greenish brown, glabrous : stems stout, 2-5 inches high paniculately much 

 branched: staminate plants brownish-yellow, smaller, its flowers in long 

 dense spikes, often 9-17 on a single axis, buds ventricose with the upper 

 edge curved outward ; calyx 3-5-, usually 4-parted. 1)^-2 lines wide : anthers 

 sessile below the middle of the lanceolate acuminate lobes : pistillate plant 

 commoly of a dark olive-brown color, accessory branchlets mostly leaf-bear- 

 ing : fruit 2% lines long. On various conifers, Oregon to California and 

 Idaho. 



Var. abietinum. Arceuthobium abietinum Engelm. More spread- 

 ing and less densely branched: the accessory branchlets in the fertile 

 plant bearing fertile flowers as often as they do leaf-buds. On Abies gran- 

 dis, Columbia river valley. 



R. robnsta Kuntze 1. c Arceuthobium robustum Engelm. Reddish- 

 brown and glabrous : stems 2-4 inches long, much branched : staminate 

 flowers in short spikes, flat, appressed to the rachife, 3-parted, with broad 

 lobes, bearing the stamens above the middle fertile flowers mostly solitary : 

 fruit 2-3 lines long. On Pinus ponderosa, Brit. Columbia to Oregon. 



ORDER LXXXVIII FAGACE^E Drude Phan. 40 9 



Trees or shrubs with alternate leaves, deciduous stipules 

 and small monoecious flowers, the staminate in aments, the pis- 



