366 



LOR A NTH AC EJE. 



stem or trunk attached to the branch of the host. The plant does 

 not reproduce vegetatively, at least in this region. 



3. P. Bolleanum (Seeman) Eichler. Stems % to f ft. long; leaves 

 narrowly oblong or spatulate, obtuse, contracted to a short petiole, 

 \ to 1 in. long; bracts ciliolate; spikelets short, mostly less than \ in. 

 long, opposite or in fours; berries pearl-like on account of their white- 

 ness, translucency, and luster, rather less than 2 lines in diameter. 



Northeastern base of Mt. St. Helena, on Cupressus MacNabiana, 

 Jepson; Mt. Tamalpais, on Juniper, Alice Eastwood; inner Coast 

 Ranges west of Bakerstield, on Juniper. Rare in our region. 

 Fruiting in Dec. 



2. RAZOUMOFSKYA Hoffm. 



Plants yellow or yellowish brown, leafless, fragile-jointed, parasitic 

 on coniferous trees. Stems quadrangular or angled. Leaves repre- 

 sented by connate scales. Flowers solitary or several in each axil, 

 crowded into apparent spikes, opening in autumn. Staminate 

 flower: —calyx mostly 3-parted, compressed; stamens consisting of a 

 single 1-celled roundish anther, opening by a circular slit. Pistillate 

 flower: — calyx 2-cleft, the teeth laterally disposed, the ovary ripening 

 the next autumn after flowering and exserted on the recurved pedicel. 

 Berry circumscissile near the base, when fully ripe explosively dehis- 

 cent at a touch or when teased, the glutinous seed being expelled to 

 a distance of several feet. (Count Alexis de Razoumoftsky, Russian 

 savant of the early part of the 19th century, who possessed a large 

 botanic garden near Moscow.) 



1. R. occidentalis (Engelm.) O. Kuntze. Pine Mistletoe. 

 Stems dichotomously branched, 4 to 15 in. long, the branches bearing- 

 numerous spikes, the lower spikes commonly with accessory spikes 

 in the axils; staminate spikes deep yellow, £ to § in. long; staminate 

 flowers exceeding 1 line in breadth; pistillate plants olive-brown; 

 spikes short, 5 or 6-flowered, arranged along the axis of the inflo- 

 rescence, the upper spikelets mostly reduced to 1 flower, and the 

 inflorescence paniculate; berries brown, oblong, tapering to each 

 end, 2 to 2£ lines long. — (Arceuthobium occidentalis Engelm.) 



Common on Digger Pine (Pinus Sabiniana) all through the inner 

 Coast Ranges from Mt. Diablo and Putnam's Peak (Vaca Foothills) 

 to Berryessa -Valley and Butts' Canon in northern Napa Co. Also 

 on Yellow Pine (Pinus ponderosa) at the head of Conn Valley near 

 St. Helena. Oct. -Jan. The accessory and primary branchlets are 

 anterior and posterior, not side by side. The plant parasitic on 

 Pinus attenuata, summit of Mt. St. Helena, Jepson, is referred to 

 R. Douglasii (Engelm.) O. Kuntze var. abietina (Engelm.) Greene 

 in Greene's Manual. 



SYMPETALiE. 



Corolla almost always present, consisting of more or less united 

 petals; stamens inserted upon the corolla except in the first family; 

 stipules in ours none. 



