PAPEES ON LOEANTHACEiE. 
493 
Arceuthobium robustum, Engelm. PL Fendl. p. 59 ; A. cryptopodum, hngehn. PI. Lindb. p. 214. Stout, 2 4 
inclies high, 2-3 lines thick at base, paniculate, much branched, brownish-yellow to dark olive-brown ; starninate 
plants smaller than the pistillate ones ; staniinate spikes with much-compressed,, adpressed buds ; flowers mostly 3- 
parted, Ij-lj lines wide ; anthers attached above the middle of the ovate, acute lobes ; ripe fruit 2^ lines long. 
Only on Pmus ponderosa, Colorado, New Mexico, and Arizona ; Camp Apache (G. K. Gdhert, and Mount 
Graham (Rothroch, 787), 1874. Flowers in June. Fruit mature in August and September. The closely alhed 
^A. occidentale, Engelm., is distinguished by more elongated spikes, ventricose, divaricate buds^of the staniinate, mostly 
4-parted, larger flowers, with lanceolate, acuminate lobes and anthers attached below their centre ; it also occurs on 
Pinus ponderosa, but more frequently on other conifers. Both persist for several years, the female plants always 
longer than the male. 
From the Botany of California, Yol. II., by Sereno YAtson, Cambridge, 1880.^ 
PHOEADENDEON, Nutt. 
* Leaves foliaceous, mostly dilated upward from a narrow base. [105] 
1. P. FLAVESCENS, Nutt. Branches terete, pubescent when young (as also the spikes), often a foot long or more: 
leaves obhinceolate to obovate or orbicular, J to 2 inches long, obtitse, 3-nerved, at last glabrous : l)racts connate into a 
short truncate cup : flowers depressed-globose, the calyx-lobes ciliate on the margin : starninate spikes opposite or ver- 
ticillate, usuallv shorter than the leaves, 3-7-jointed, the numerous flowers mostly in 4 to 6 rows on each side and 
occupying nearly the whole joint, very fragrant with the odor of pond-lilies ; anthers transverse, opening by 2 pores : 
pistillate spikes usually opposite, shorter (rarely 5-6-jointed), the flowers (2 to 7 on each side ot a joinl) in not more 
than three series : berries white, 2 lines in diameter. — Engelm. PI. Lindh. 212. 
mon glabrate spatulate-leaved southeastern form. 
Var. MACROPHYLLUM, Engelm. Leaves large (2 
larger, in stout short-jointed spikes. — Wheeler’s Eep. vi. 252. 
Yar. viLLOStiM, Engelm. 1. c. Leaves small or middle-sized, orbicular to spatulate, permanently pubescent or 
tomentose : spikes slender, rather short. — P. villosum, Nutt. 1. c. ; Engelm. PI. Lindh. 212. 
The latter variety is common throughout the Stat^, chiefly on oMcs, from S. California to Oregon, and eastward 
to New Mexico and Texas ; the former occurs on Popiilvs, Plakmus, Fraxmus and other trees, from S. California to 
New Mexico. Var. tomentosum (Viscum to7nentosum^'DC.) is found in Northern Mexico, on Mwiosece, and is densely 
tomentose, with slender elongated spikes. 
2. P. Bolleanum, Eichler. Puberulent, at length glabrous : branches terete, less than a span long : leaves 
thick, spatulate to linear, 6 to 12 lines long by 1 to 3 wide, nerveless, obtusish : spikes opposite or rarely in fours, with 
connate minutely ciliate bracts ; the starninate of two e-12-flowered joints, the fertile ot a single 2-flowered joint : 
anthers transverse, opening by pores : fruit white, 1 J lines in diameter. — FI. Bras. v-. 134“. Viscicm Bolleanum, 
Seem. Bot. Herald, 295, t. 63. P. paudflorum, Torrey, Pacif. E. Eep. iv. 134. 
On conifers, mostly Juniperus, from the .Geysers (Breicer) to San Felipe (Palmer) and into Arizona and Mexico ; 
also on Guadalupe Island, Palmer. A specimen on Abies concolor, from Duffield’s Eanch near Auburn (Bigelow), is 
larger and with larger broader leaves. 
^ Leaves reduced to short mostly connate scales : spikes opposite, mostly few-flowered. 
3. P. Calipornicum, NuU. Pubescent or at last glabrous : ])ranches terete, slender, a foot or two long : scales 
broadly ovate, acute, spreading : staniinate spikes of 2 or 3 (rarely 5) flower-bearing joints, each with 2 to 6 ovate- 
subglobose flowers : anther-cells oblong, opening by a longitudinal slit: fertile spikes sometimes with nearly as many 
joints and flowers, the joints elongated (often an inch long) in fruit : berries reddish, 2 lines wide. — PI. Gambel, 185 ; 
’Engelm. PL Lindh. 213. 
Southern California and Arizona, on various Mimojece and Cassiece, Larrca, etc. 
4. P. juniperinum, Engelm. Glabrous, stout, densely branched, 6 to 9 inches high : branches terete, the ulti- 
mate branchlets quadrangular : scales broadly triangular, obtusish, connate or distinct, ciliate : starninate spikes of a 
single 6-8-flowered joint (rarely two) : anthers transverse, opening by pores : pistillate spikes 2-flowered : berry glo- 
bose, whitish or light red, 1| lines wide. — PI. Fendl. 58. 
Yar. Libocedri, Engelm. Branches a foot long or more, slender : joints more elongated, the ultimate ones more 
sharply quadrangular. 
On different species of Juniperus, from Truckee Pass southward and through S. Nevada and Arizona to New 
Mexico : the variety on Lihocedrus decurrens, IrGin the \ uba Eiver to San Bernardino. 
* The generic characters are omitted from this paper, having been given elsewhere. As stated on p. 104, only the fol- 
lowing species of Phoradendron are found within the limits of the United fetates. -Lds. 
Viscum Jlavescens, Pursh, the com- 
2| inches long), broad, often 5-nerved, glabrate : flowers 
/t 78 ',Tr . zo./* 
