EXOGENS. 79 



BBRRT. Box-like, 1° high ; fls. white', red-tinged, racemed. Mts. Va. 

 3. Macle^nia. Corol. 5-merous, red or yellow. Handsome shrubs. 

 Peru. 4. Oxycoccus, Cranbbrky. Corol. 4-merous, berries red, 

 acid. O. palustris, s't. creeping; Alpine bogs, N. Asia, N. Eur., 

 N. Am. above lat. 42°. O. wuu^rocdrpus, st. prostrate ; peat bogs. 

 Va. to Wis., North. 5. Chiogenes hispidula, Cbkepinq -Snow- 

 BKRRY. Corol. 4-merous ; St. creeping, evergreen ; berries white. 

 Bogs N. Am., north of lat. 42°. 



Sub-Ord. 3. Pyrolacese. — Ova. free. Corol. 5-merous. Boll 

 oo-seeded. Evergreen herbs. 6 gen., 20 spec. N. hemisphere. 1. 

 Chimaphila, Pipsissewa, Prince's Pine. 3'-10' high, fls. wax- 

 like, flesh-colored, fragrant, umbelled. Woods, Siberia, N. Eur., 

 N. Am. C. umbelldta, 4-7 fls. N. States, Can. C. maculata, 1-5 

 fls., Ivs. spotted. Can. to Car., Tenn. 2. Pyrola, Wintbrqreen. 

 Pis. racemed, white or purple ; Ivs. rad. Several spec, in U. S. P. 

 rotundifolia. Scape 6'-12' high ; fls. large, white, nodding, fragrant. 

 Can. to Car., W. to Wis. 



Sub-Ord. 4. Monotropeae. — Ova. free. Corol. 4-5-merous. Boll 

 oo-seeded. Leafless root-parasites, never green ; small. 6 gen., 11 spec. 

 N. hemisphere. 1. Newberrya eongesta, fls. capitate. N. Pacific States. 



2. Sctiweinitzia odordta, fls. capitate, violet-scented. Md. to N. C. 



3. Monotropa. 6 spec; both worlds. M. Hypbpytis, Pine Sap; 

 fls. racemed. Can. to Car , W. to Wis. M. uniflbra, Indian Pipe; 

 clay color, fl. large, terminal, nodding. Can., U. S. common. 



Sub-Ord. 5. Ericinese. — Ova. free. Corol. 4-5-merous. Antb. 

 2-celled ; cells sepa. at base or top ; dehisc. porous. Pr. oo-seeded, sds. 

 minute ; boll, berry, or drupe. . 50 gen., 900 spec. 4 Tribes : 



Tribe 1. Rhododendrons. Boll. Corol. 5-merous, sometimes irreg. ; 

 decid. 1. Leiophyllum buxifbliuin, Sand Myrtle. Only spec. ; 

 evergreen, 6'-10' high; fls. wliite, umbelled. N. J., mts. of Va , 

 Tenn., N. C. 2. Ledum, low shrubs. N. hemisphere. L. latifblium, 

 Labrador Tea, 2°-5° high ; Ivs. ferruginous, fls. white, racemed. 

 Mt. bogs, Penn. to Brit. Am. 3. Befaria (Bejaria). Handsome 

 evergreen shrubs, fls. large, showy. Peru, Mex. Sev. spec. ; one, 

 B. racembsa, in E. Ga., Pla., and adjacent islands; 2°-4° high, fls. 

 white, red-tinged. 4. Rhodora canadensis, 2°-3° high ; fls. irreg., 

 large, pink. Can. to Penn. 5. Rhododendron. Fls. irreg , large, 

 red or white, often fragrant. Many spec, usually evergreen. N.Am., 

 Eur., Asia, finest and most abundant in India. R. lappbnieum, 5' 

 high. Lapland. R. Rollissbnii, 30° high, 4° in girth. Ceylon. R. 

 Falebneri, 50° high, Ivs. 19' long. R. DalhoAsise, straggling, 8° high, 

 fls white, fragrant ; epiphytal on limbs of largo trees. Himalayas, 

 9000 ft. above sea. R. catawbiense, 3°-6° high, fls. purple. Va. mts , 

 S. R. maximum, 6°-20° high, Ivs. 10' long, fls. pale rose or white, 

 spotted with red or yellow. Va. mts. to Maine and Can. 6. Azalea. 

 Lvs. decid. ; fls. irreg., large, white, or of various showy colors ; corol. 

 funnel-shaped, lobes spreading. 20 spec, N. Am., Asia. A. arbo- 

 rescens, 10°-20° high, fls. rose. Mts., Penn. to Ga. A. ealenduldcea, 

 fls. yellow or crimson. Penn to Ohio and Ga. A. nudiflbra, 5°-10° 

 high; fls. before lvs.; white, pink, yellow, purple, fragrant, S. A. 

 viscbsa, 4°-]0° high ; fls. with lvs. ; white or rose, fragrant. Mass. to 

 111., South. 7. Loiseledria procumbens, Alpine AzXlba. Only 

 spec. ; evergreen, 3'-8' high, fls. small, white or pink. N. Asia, N. 



