ORDER 73. ERICACEAE. 197 



1 S. perfoliata Lam. St. mostly simple, erect ; Ivs. reniform-ovate, cordate-clasping, 



crenate ; fls. sessile, aggregate, axillary. Fields, copses. If. Fls. deep blue. Jn.,Jl. 



2 S. Ludovlciana Torr. St. branched, branches slender; Ivs. ovate, acute, subentire, 



sess. or slightly clasping ; ovaries slender, fls. smaller (5" broad). S. Car. to La. 1 2f. 



3 S SPECULUM. Venus' Looking-glass. Stem diffusely branching ; Ivs. oblong, crenate ; 



fls. solitary, with shallow lobes, blue varying to white, all Summer. S. Eur. Hardy. 



3. PLATYCODON, A. DC. Cor. large, bowl-shaped. Stig. 5, thick, 

 spreading. Caps, ovoid, opening at the top by 5 acute valves, u Siberia. 

 Smooth and glaucous. 

 I*. ORANDIFLORUM. Lvs. lance-ovate, serrate ; fls. 2', blue var. to wh., few, terminal. 18'. 



ORDER LXXIII. ERICACEAE. HEATHWORTS. 



Plants shrubby or suffruticous, sometimes herbaceous, with Leaves sim- 

 ple, alternate or opposite, mostly evergreen, without stipules. Corolla regu- 

 lar or somewhat irregular, 4-5-cleft, the petals rarely distinct. Stamens as 

 many or twice as many as the petals, free, hypogynous. Anthers 2-celled, 

 generally open by pores, often appendaged. Pollen (except in Monotro- 

 pese) compounded of 4 united grains. Embryo straight, lying in the axis of, 

 or in the end of fleshy albumen. Figs. 64, 89, 90, 99, 114, 248, 255, 311, 438. 



Ovary adherent, in fruit a berry crowned by the calyx teeth. Shrubs. . .(Suborder I.) 

 Ovary free. x Shrubs, trees. Capsule or berry with the cells 00 -seeded. . .(Suborder II.) 

 x Shrubs. Fruit a capsule with the cells one-seeded. . .(Suborder III.) 

 x Herbs half-woody, low. y Leaves evergreen. Stamens distinct... (Suborder IV.) 

 y Leaves evergreen. Filaments united. ..(Suborder V.) 

 y Leaves none. Plants without verdure. . .(Suborder VI.) 



I. VACCINES. a Fls. 5-parted. Berries 10-seeded. Shrubs often resinous-dotted... GAYLUSSACIA. 1 



a Flowers 5-parted. Berries 00 -seeded. Shrubs dotless VACCINICM. 2 



a Flowers 4-parted. b Petals narrow, reflexed. Berries red Oxrcoccns. 3 



b Petals short, spreading. Berries white CHIOGENES. 4 



II. ERICINE^E.c Flowers 4-parted. Sepals colored, larger than the corolla CALLUNA. 5 



e Flowers 4-parted. Sepals small... (Gen. 11, or) ERICA. 6 



c Flowers 5-parted. ft Petals distinct, or very nearly polypetalous...(7/i) 



d Petals united, monopetalous...(e) 

 f Corolla funnel- or bell-form, with spreading lobes... (A:) 

 e Corolla urceolate (ovoid, cylindric or globular), lobes small. . .(/) 



e Corolla saucer-form, holding the anthers in 10 pits KALMIA. 7 



Corolla salver-form, very fragrant. Trailing shrublet EPIO^BA. 8 



/ Fruit fleshy, the matured ovary 5-seeded ARCTOSTAPHYI.OS. 9 



/ Fruit fleshy, the matured calyx 00 -seeded GAULTHERI A. 10 



f Fr. dry, capsular, </ septicidal. Lvs. linear, heath-like... .MENZIESIA. 11 



g loculicidal. 7t Lvs. linear, moss-like.. CASSIOPE. 12 



h Lvs. ample. Shrubs... ANDROMEDA. 13 



h Lvs. ample. Trees OXYDENDRCM. 14 



7.- Stamens 5, included. Plant and leaves very small LOISELEURLA. 15 



Jc Stamens 5 (rarely more), long-exserted. Cor. funnel-form.. AZALEA. 16 



Je Stamens 10 (rarely fewer), exserted. Cor. bell-form RHODODENDRON. 17 



wi Corolla very irregular, open before the leaves appear RHODOKA. 18 



m Cor. regular, n 7-petalled. Stamens 14 BEFARIA. 19 



n 6-petalled. o Capsule 5-celled LEDUM. 20 



o Caps. 3-celled. p Fls. umbelled. .LEIOPIIYLLUM. 21 

 p Fls. racemed...CLETHRA. 22 



III. CYRILLE-/E. r Flowers 4-parted, with 8 stamens and a 2-celled capsule ELLIOTTIA. 23 



r Flowers 5-psrted, z with 5 stamens and a 2-celled capsule CYRILLA. 24 



with 10 stamens. Caps. 3-celled, 2-winged..MrLOCARiUM. 22 



