6gi 



ERICACEAE. 



Vol. II. 



Corolla 4-5-toothed, the short teeth spreading or recurved. Stamens 8 or 10, included; anther 

 with 2 recurved dorsal awns. Ovary 4-s-celIed ;. ovules i in each cavity. Drupe globose, 

 with 4 or 5 separate l-seeded nutlets. [Greek, referring to its shining leaves.] 

 A monotypic genus of the arctic zone and high mountain summits. 



I. Mairania alpina (L.) Desv. Alpine or Black Bearberry. Fig. 3250. 



Arbutus alpina L. Sp. PI. 395. 1753. 



Mairania alpina Desv. Journ. Bot. (II) I : 37, 292. 1813. 

 Arctostaphylos alpina Spreng. Syst. 2: 287. 1825. 

 Arctoiis alpina Niedenzu, Engl. Bot. Jahrb. 11 : 141. 1890. 



Tufted or depressed-prostrate; branches 2'-$' high, the 

 twigs glabrous or very nearly so. Leaves obovate, crenu- 

 late, conspicuously reticulate-veined, ciliate at least when 

 young, 4'-i' long, 3"-y" wide; flowers few, appearing 

 from scaly buds before or with the leaves ; corolla white, 

 ovoid, constricted at the throat; drupe black (or bright 

 red, according to Macoun), juicy, 3"-s" in diameter. 



Summits of the higher mountains of New England ; Que- 

 bec to Newfoundland, Alaska and British Columbia. Also in 

 northern Europe and Asia. Summer. 



25. CALLUNA Salisb. Trans. Linn. Soc. 6: 

 317. 1802. 



A low much branched evergreen shrub, with minute 

 linear opposite crowded and imbricated leaves, and small 

 white or pink flowers, in terminal one-sided dense, spike- 

 like racemes. Sepals 4, scarious, concave, obtuse, longer 

 than and concealing the corolla. Corolla campanulate 

 when expanded, 4-parted, slightly twisted, persistent, becoming scarious. Stamens 8, distinct; 

 filaments short; anthers oblong, attached to the filaments by their backs, opening by a longi- 

 tudinal slit, each sac with a dorsal reflexed appendage. Disk 8-lobed. Ovary depressed- 

 globose, 8-angled ; style slender ; stigma capitel- 

 late. Capsule somewhat 4-sided, 4-celled, sep- 

 ticidally 4-valved, few-seeded. Seeds ovoid, 

 pendulous, not winged. [Greek to sweep, its 

 twigs used for brooms.] 



A monotypic genus of Europe and Asia. 



I. Calluna vulgaris (L.) Salisb. Ling. 

 Heather. Moor. Besom. Fig. 3251. 



Erica vulgaris L. Sp. PI. 352. 1753. 



C. vulgaris Salisb. Trans. Linn. Soc. 6: 317. 1802. 



A straggling shrub, the branches ascending, 

 3-15' high, the twigs puberulent or glabrous. 

 Leaves sessile, about i" long, very numerous, 

 imbricated in 4 rows, usually 2-auricled at the 

 base, 3-angled, grooved on the back, glabrous, 

 ciliate or canescent; calyx with 4 small bracts at 

 the base; corolla about i4" long, nearly concealed 

 by the 4 scarious pink or white sepals. 



Sandy or rocky soil, Newfoundland to New Jersey. 

 Naturalized or adventive from Europe. Grig. July- 

 Sept. 



Erica cinerea L.. the Scotch heath, found at one 

 spot on Nantucket Island, has an ovoid' 4-toothed 

 corolla, much longer than the calyx (about 3" long) 

 and linear leaves, mostly verticillate in 3's. 



Erica Tetralix L., the cross-leaved heath, also on 

 Nantucket, has a similar corolla and linear leaves 

 verticillate in 4's. Both are waifs from Europe. 



Family 5. VACCINIACEAE Lindl. Veg. Kingd. 757. 1847. 

 Huckleberry Family. 

 Erect or prostrate shrubs, or small trees, with alternate simple leaves, and 

 small clustered or solitary perfect flowers, the pedicels commonly bracted. Calyx- 

 tube adnate to the ovary, the limb 4-5-lobed or 4-5-cleft. Corolla gamopetalous, 

 4-5-lobed, or rarely divided into separate petals, deciduous, globose, campanulate, 

 urceolate, or tubular. Stamens twice as many as the corolla-lobes, epigynous, or 



