ERICACEAE (HEATH FAMILY) 641 



1.5-3 cm. broad, sharply and closely serrulate, bright green, nearly smooth ; 

 border of the calyx almost entire ; corolla depressed-globular, rather large ; ber- 

 ries large, black, rather acid. ( F. myrtilloides Man. ed. 6, not Michx.) — 

 Damp woods, L. Superior, and northwestw. — Pedicels 5-15 mm. long, drooping 

 in flower, erect in fruit. 



15. V. ovalifblium Sm. Similar, straggling, 5-15 dm. high ; leaves elliptical, 

 obtuse, nearly entire, pale, mostly glaucous beneath, smooth ; corolla ovoid ; 

 berries blue. — Low woods and mountain slopes, Lab. to Alaska, s. to Nf d. , 

 e. Que., n. Mich., and Ore. 



§ 4. VtTIS-IDAEA [Tourn.] Koch. Corolla, berry, etc., as in ^ Z ; filaments 

 hairy; anthers aionless ; leaves coriaceous and persisteiit ; flowers in clus- 

 ters from separate buds, 4-merous {in our species); mostly glabrous. 



16. V. Vitis-Idaea L. (Cowberry, Foxberry.) Low (1-2.5 dm. high); 

 branches erect from tufted creeping stems ; leaves obovate with revolute mar- 

 gins, dark green, smooth and shining above, dotted loith blackish bristly points 

 underneath, 1.5-3 cm. long, 7-16 mm. broad ; corolla bell-shaped, 4-cleft, white 

 or pink : berries dark red, acid and rather bitter, edible when cooked. ( Vitis- 

 Idaea Britton.) — Eu. Represented v;ith us by 



Var. minus Lodd. (Mountain or Rock Cranberry.) Dwarf, forming close 

 or loose mats 2-10 (rarely even 20) cm. high ; leaves very thick and coriaceous, 

 5-18 mm. long, 4-9 mm. broad ; corolla rose-pink or red. — Dry or rocky banks, 

 rarely wet moss, Arctic Am., s. to the mis. of Me., N. H., and Vt., L. Superior, 

 etc.; and along the coast to Cape Ann, Mass. (Greenl., e. Asia.) 



§ 5. OXYCOCCOS [Tourn.] Hook. Corolla deeply ^-parted or -cleft, icith linear 

 reflexed lobes; cmthers exserted, aicnless, icith very long terminal tubes; 

 berry 4:-celled; flowers axillary or terminal, nodding on long filiform pedicels. 



* Stem upright and leaves deciduous, as in common Blueberries ; floivers axil- 

 lary and solitai^ ; corolla deeply 4:-cleft; berries light red, turning purple, 

 insipid. 



17. V. erytlirocarpum Michx. Smooth, divergently branched, 3-18 dm. 

 high ; leaves oblong-lanceolate, taper-pointed, bristly-serrate, thin. (Oxycoccus 

 Pers.) — Damp woods, higher Alleghenies, Va. to Ga. July. 



** Stems very slender, creeping or trailing; leaves small, entire, lohitened be- 

 neath, evergreen ; pedicels erect, the pale rose-colored flower nodding ; corolla 

 4r-parted ; berries red, acid. — Cranberries. 



18. V. Oxyc6ccos L. (Small Cranberry.) Stems very slender, the branches 

 almost capillary, erect or ascending ; leaves oblong or ovate, 3-8 mm. long, 1-3 

 mm. broad, strongly revolute, becoming narrowly triangular in outline, con- 

 spicuously lohitened beneath ; pedicels 1-4, springing from a terminal (rarely 

 proliferating) short rhachis (at most 3 or 4 mm. long), and bearing near or 

 below the middle 2 lanceolate or lance-ovate often involute colored bractlets 

 (1-2.5 mm. long); corolla-segments 5-6 mm. long; filaments ^ as long as the 

 anthers; berry 6-8 mm. in diameter. (Oxycoccus MacM.; O. palustris Pers.) — 

 In sphagnum and wet humus, Arctic Am., s. to Pa., ]Mich., and Wise. (Eurasia.) 

 Var. intermedium Gray. Coarse) ; leaves 6.5-15 mm. long, 3-6.5 mm. broad, 

 acute or obtuse, only slightly revolute; pedicels 2-10, from a longer (often 5-10 

 mm. long) rhachis; corolla-segments 6-8 mm. long; beriy 8-10 mm. in diam- 

 eter. — Nfd. to B. C., s. to Mich., and in the mts. to N. C. (Asia.) 



19. V. macrocarpon Ait. (Large or American Cranberry.) Stems com- 

 paratively stout, elongated, the flowering branches ascending ; leaves oblong- 

 elliptic, blunt or rounded at tip, 6-17 mm^ long, 2-8 mm. broad, pale or slightly 

 whitened beneath, flat or slightly revolute ; pedicels 1-10, springing from an 

 elongated (1-3 cm. long) rhachis which is terminated by a long leafy shoot, and 

 bearing toward the tip 2 flat leaf-like bractlets (4-10 mm. long) ; corolla-segments 

 6-10 mm. long; filaments scarcely i the length of the anthers; berry 1-2 cm. 

 in diameter. (Oxycoccus Pers.) — Open bogs, swamps, and wet shores, Nfd. to 

 I;. Erie, w. Wise, and south w. to W. Va. and Ark., mostly northeastw. 



qeay's manual — 41 



