SANTALACE^. 32S 



6 to 8-flowered joint : pistillate spikes 2-flowere(l : berry whitish or light rc«l. 

 — PI Feiull. 58. On different species of Junipcrus. S. W. Colorado to Now 

 Mexico, Arizona, Nevada, and California. 



2. ARCEUTHOBIUM, Bieb. 



Flowers axillary or terminal, solitary or several from the same axil. Para- 

 sitic on Conifers, glabrous, with rectangular branches and coiuiato wale-like 

 leaves : flowers often crowded into apparent spikes or jtaniclcs, optMiing in 

 Slimmer or autumn and maturing their fruit in the second autumn, when the 

 berries suddenly and forcibly eject the glutinous seed to the di.<tan(i- of wv- 

 eral yards. 



* Staminate flowers all {or nearly all) terminal on dlstinrt jxduitcif-iikr j<>iui>, 



paniculate. 



1. A. Americanum, Nutt. Slender, dicliotomously or verticillately 

 much branched, greenish yellow: staminate plants sometimes 3 or 4 inchca 

 long, fertile plants much smaller. — On Pinns amturta. From Wyoming to 

 Oregon and southward to Colorado and California. 



* * Staminate flowers axillnrij [with a terminal one), forming simple or comjwund 



spikes. Ours are greenish-brown, with the accessor// brancldets of fruiting speci- 

 mens mostli) leaf-bearing. 



2. A. divaricatum, Engelm. Rather stout, 2 to 4 inches hij:h, and a 

 line in diameter at base, olive-green or pale brownish : branches sjirradinq, 

 oflen flexuous or recurved : staminate flowers few and scattered ur in 3 to 7 flow- 

 ered spikes, with ovate acute lobes. — PI. Wheeler, 1874, 16. (3n Pinus edtilis 

 and P. monnphijUa, from New Mexico and S. Colorado to Arizona and S. Utah. 



3. A. robustum, Engelm Stouter and not so spnading: spikes miirfi 

 denser, the buds of the staminate flowers flat and appressed, and the 3 parted 

 flowers with shorter and broader lobes. — On Pinus ponderosa. Arizona and 

 northward in the Rocky Mountains. 



Order 69. SANTALACE.E. 



Herbs or shrubs, usually root-parasitic, with anglod or striate branciir.s. 

 entire alternate and mostly sessile leaves witlntiit stipules, and mostly 

 perfect flowers with 3 to 5-cleft perianth adherent to the l-cidlcd "2 to 4- 

 ovuled ovary, which becomes an indehiscent 1 -seeded nsnally nut-like 

 fruit; stamens 3 to 5, opposite the perianth l(d>es, at the edge of an 

 epigynous often lobed disk ; style 2 to 5-lobed. 



1. COMANDRA, Nutt. Bast.\rd Tovi>-Fl.\x. 



The campanulate or urn-shaped perianth with a 5-lobcd persistent limb 

 Disk with a free lobed margin.. Stamens included : anthers attached by tiifis 

 of hairs to the base of the calyx-lobes. — Low herbaceous smooth perennials, 

 with sul)terranean rootstocks : leaves glaucous, the lowest scale-liko : flowent 

 Ecreenish white, in small terminal or axillary umbellate dusters. 



