344 FLORA. 



the apex, narrowed at the base, 3-nerved and with 1-3 pairs of weaker veins 

 above, slender-petjoled, 6-12 mm. wide; petioles almost filiform; flowers glomerate 

 in all except the lowest axils, the clusters shorter than the petioles; bracts of the 

 involucre linear, 2-3 times as long as the flowers; style almost none; achene about 

 I mm. long. On dry rocks and banks, Ont. to Br. Col., Fla., Colo, and Mex. 

 June-Aug. 



Order 10. PROTEALES, 



includes only the Family Proteaceae, with nearly 1000 species, all natives 

 of the southern hemisphere. 



Order n. SANTALALES. 



Herbs or shrubs, mostly parasitic, the flowers with a calyx, but 

 without a corolla, perfect or imperfect, clustered or solitary. Ovary i, 

 inferior, at least in part i -celled. 



Fam. i. Loranthaceae. 

 i drupe, or nut. 

 Fam. 2. Santalaceae. 



Tree-parasites, with opposite leaves or scales; fruit a berry. Fam. i 



Root-parasites, or shrubs; leaves alternate in our genera; fruit a drupe, 



Family i. LORANTHACEAE D. Don. 

 Mistletoe Family. 



Parasitic green shrubs or herbs, containing chlorophyll, growing on 

 woody plants and absorbing food from their sap through specialized 

 roots called haustoria (a few tropical species terrestrial). Leaves in the 

 following genera opposite, in Razoumofskya reduced to opposite scales. 

 Flowers regular, terminal or axillary, dioecious or monoecious, and peri- 

 anth simple, or in some exotic genera perfect, and with perianth of 

 both calyx and corolla. Calyx-tube adnate to the ovary. Stamens 2-6. 

 Ovary solitary, erect ; style simple or none ; stigma terminal, undivided, 

 obtuse. Fruit a berry. Seed solitary, its testa indistinguishable from 

 the endosperm, which is usually copious and fleshy ; embryo terete 

 or angled. About 21 genera and 500 species, widely distributed ; most 

 abundant in tropical regions. 



Leaves scale-like, united at the base; anthers i-celled; berry peduncled. 



i. Razoumofskya. 

 Leaves thick, flat; anthers 2-celIed; berry sessile. 2. Phoradendron. 



i. RAZOUMOFSKYA Hoffm. [ARCEUTHOBIUM Bieb.] 



Small or minute fleshy glabrous plants, parasitic on the. branches of coniferous 

 trees, their branches 4-angled, and leaves reduced to connate scales. Flowers 

 dioecious, not bracted, in the axils of the scales. Staminate flowers with a 25- 

 parted calyx and usually an equal number of stamens, the anthers sessile on the 

 segments. Pistillate flowers with the ovary adnate to the tube of the calyx, 

 the calyx-limb 2-parted. Disk present in both kinds of flowers. Berry fleshy, 

 ovoid, more or less flattened, borne on a short somewhat recurved peduncle. 

 Embryo enclosed in the copious endosperm. [In honor of Alexis Razoumofski, 

 Russian botanist.] About 10 species. Besides the following, 7 or 8 others occur 

 in western N. Am. and Mex., 2 in Europe and Asia. 



I Razoumofskya pusilla (Peck) Kuntze. SMALL MISTLETOE. (I. F. f. 

 1271.) Plant inconspicuous; stems 4-20 mm. long, nearly terete when fresh, 

 somewhat 4-angled when dry. Scales suborbicular, appressed, obtuse, about 

 I mm. wide; flowers dioecious, solitary in most of the axils, longer than the scales; 



