BOREALES BOLLEANAE 25 



Leaves short, resembling scales, but thick and disarticulating: glabrous: 

 spike 1- jointed. P. minutifolium. 



Leaves linear-oblong. 



Tomentose : spike often 2- or 3-jointed. P. capitellatum. 



Minutely papillate or hispid : spike mostly 1- jointed. 



Staminate spike about 12-flowered. P. tequilense. 



Staminate spike about 6-flowered. P. saltUlense. 



Leaves somewhat spatulately linear. P. Bolleanum. 



Leaves oblanceolate-spatulate. 

 Spike mostly 1-jointed. 



Staminate spike about 12-flowered. On Juniperus. P. densum. 

 Staminate spike about 8-flowered. On Abies, etc. P. pauciflorum. 

 Spike mostly 2-jointed: Staminate spike about 6-flowered. 



P. guadalupense. 

 PHORADENDRON MINUTIFOLIUM (Urban). 



PJioradendrum minutifolium Urban, Bot. Jahrb. vol. 23. Beiblatt 57. 

 p. 2. 1897. 



Not forked, the moderately short and slender somewhat squarish 

 branches without cataphyls, dioecious. Internodes short (1-2x10 mm.), 

 glabrous. Leaves scale-shaped as in the preceding but fleshier, spreading, 

 half-ovate, acute, articulated at base and deciduous, 2-3 mm. long. Spikes 

 solitary, very short (scarcely 3 mm.), smooth, with a single joint. 

 Fruit 1 Plate 16. 



Eastern Sierra Madre region ( ? exclusively) on Juniperus. The 

 type from Eastern Mexico. Forming a transition to the preceding group. 



Specimens examined : MEXICO. Llanos de Perote (Schiede, 402,-ihe 

 type). Cofre de Perote (Humboldt, -associated with Arceuthobium 

 vaginatum) . 



Phoradendron capitellatum Torrey, n. sp. 



Phoradendron capitellatum Torrey in herb. 



Viscum Reichenbachianum Seemann, Bot. Herald, p. 295. 1852-7, as 

 to the Wright citation only. 



Not forked, the moderately long and slender branches without cata- 

 phyls, dioecious. Internodes short (1-3x5-10 mm.), at least for a time 

 densely stellate-tomentose. Leaves narrowly elliptical-oblong or in- 

 volutely linear, submucronately acute, sessile, 2x10-15 mm. Spikes soli- 

 tary, very short (5 mm.), with mostly 2 rounded joints 2-flowered when 

 pistillate and about 6-flowered in 6 series when staminate : scales somewhat 

 hairy: peduncle suppressed. Fruit straw-colored, subglobose, about 

 4 mm. in diameter : sepals somewhat pointed. Plate 17. 



Chihuahuan region ( ? exclusively) on Juniperus, The type from 

 New Mexico. 



