Part 1, 1914) ERICACEAE 81 
1. Erica cinerea L. Sp. Pl. 352. 1753. 
A shrub mostly 4 dm. tall or less, with minutely and inconspicuously pubescent branches; 
leaves whorled in 3’s, the blades linear to subulate on account of the strongly revolute margins, 
2-7 mm. long, acute, glabrous or nearly so; flowers in racemed or panicled clusters; calyx-lobes 
linear-lanceolate to subulate, 2.5-3 mm. long, ciliolate, sometimes obscurely so; corolla reddish- 
purple, 6-7 mm. long; filaments mostly 4.5-5 mm. long; capsules 2—2.5 mm. in diameter. 
TYPE Locality: Middle Europe. 
Distrurion: Nantucket Island, Massachusetts; presumably naturalized from Europe. 
ILLustrations: Fl. Dan. #1. 38; Engl. Bot. l. 1645. 
2. Erica Tetralix L. Sp. Pl. 353. 1753. 
A shrub mostly less than 3 dm. tall, with closely fine-pubescent and also more or less 
hirsutulous branches; leaves whorled in 4's, the blades oblong to linear, often very narrow on 
account of the revolute margins, pubescent like the branches, with the long hairs often gland- 
tipped; flowers in terminal clusters; calyx-lobes linear to oblong-linear, 2.5~3 mm. long, mi- 
nutely pubescent, ciliolate, and ciliate with several iong gland-tipped hairs; corolla pink, 6-8 
mum. long; filaments 4~6 mm. long; capsules 2.5—-3 mm. long. 
Type Locality: Northern Europe. 
DisTRIBUTION: Nantucket Island, Massachusetts; rari naturalized from Europe. 
ILLUSTRATIONS: Fl. Dan. pl. 81; Baxter, Brit. Bot. 6 : pl. 418 
35. CALLUNA Salisb. Trans. Linn. Soc. 6: 317. 1802. 
Partly woody plants with diffuse stems and branches. Leaves small, opposite, often 
4-ranked, very numerous; blades narrow, entire, sessile, usually auricled at the base, some- 
what keeled and grooved beneath. Flowers in terminal, elongate, spike-like or raceme-like 
panicles. Calyx persistent, scarious in age; lobes 4, petaloid, much longer than the tube, 
equal or nearly so. Corolla similar to the calyx, but smaller, persistent and scarious like the 
calyx; lobes 4, much longer than the tube. Stamens 8, shorter than the calyx; filaments 
slender, unappendaged; anthers narrow, with deflexed appendages on the back. Ovary 4- 
celled, lobed; style slender; stigma 4-lobed. Capsules slightly depressed, 4-valved, included 
in the persistent perianth. 
Type species, Erica vulgaris L. 
1. Calluna vulgaris (L,.) Hull, Brit. Fl. 114. 1808. 
Erica vulgaris L. Sp. Pl. 352. (1753. 
Calluna atlantica Seem. Jour. Bot. 4: 305. 1866. 
A much-branched evergreen diffuse shrub less than 4 dm. tall, growing in large tufts; 
leaves 4-ranked, green or grayish, the blades ovate to lanceolate, 1-3 mm. long, finely pubes- 
cent, clasping; flowers spreading or nodding, the subtending bracts sepal-like, the inner ones 
scarious, ciliate; calyx becoming 5.5-6.5 mm. wide, the lobes oblong, oval, or ovate, obtuse; 
corolla included in the calyx, the lobes ovate to lanceolate, shorter than the calyx-lobes; 
stamens 2—2.5 mm. long; capsule 1.5—-2 mm. broad. 
TYPE Locality: Europe. 
DIstTRiBuTION: Coastal region, Newfoundland to New Jersey; presumably naturalized from 
Europe. 
ILLUSTRATIONS? Fl. Dan. $l. 677; Hayne, Arzn. Gew. 4: pl. 17; Britt. & Brown, Ill. Fl. f. 2778; 
ed. 2. f. 3251; Meehan’s Mo. 9: 9l.'5. 
36. PERNETTIA Gaud. Ann. Sci. Nat. 5: 102. 1825. 
Shrubs with erect or depressed stems. Leaves alternate, persistent; blades leathery, 
narrow or broad, toothed, nearly flat, short-petioled. Flowers one or few together in raceme- 
like inconspicuous panicles at the ends of the branchlets, nodding. Calyx persistent; lobes 5, 
broad, often ciliolate. Corolla urceolate, ovoid or subglobose, white or pink; lobes 5, very short, 
recurved. Stamens 10, included; filaments dilated below; anthers mostly oblong or oval, 
opening at the top, appendaged at the top. Ovary 5-celled, usually spheroidal; style columnar; 
stigma minute. Berry nodding, subglobose. 
Type species, Arbutus pumila Forst. 
Branchlets hirsute-setose. 1. P. ciliata. 
Branchlets strigose-setose. 2. P. coriacea. 
