246 FLORA OF PHILADELPHIA. 



Family 4. ERICACEAE DC. Heath Family. 



Fruit a septicidal capsule; corolla deciduous; anthers unappendaged. 



Corolla somewhat irregular; seeds flat, winged. 



Corolla funnel-form, slightly 2-lipped; leaves deciduous. 



. . 1. Azalea. 



Corolla campanulate ; leaves evergreen. 2. Rhododendron. 



Corolla regular; seeds angled or rounded. 



Corolla polypetalous. 3. Dendrium. 



Corolla gamopetalous. 4. Kalmia. 



Fruit a loculicidal capsule, berry or drupe ; corolla deciduous ; anthers often 

 awned. 

 Fruit a dry capsule; calyx not accrescent, mostly small. 

 Anther-sacs opening by a terminal pore or chink. 



Sepals or calyx- tubes imbricated, at least in the bud. 

 Capsule dehiscent into a single layer of 5 valves. 



5. Leucothoe. 

 Capsule dehiscent into 2 layers, the outer 5-valved, the 

 inner 10-valved. 8. Chamaedaphne. 



Sepals or calyx-lobes valvate, or separate, in the bud. 

 Anthers 2-awned on the back. 6. Pieris. 



Anthers awnless. v ,7. Xolisma. 



Anther-sacs longitudinally dehiscent. 9. Epigaea. 



Fruit a drupe, or a capsule enclosed by the fleshy accrescent calyx. 

 Fruit consisting of the fleshy calyx, surrounding the capsule. . ' 



1Q. Gaultheria. 

 Fruit a drupe with 4 or 5 nutlets. 11. Arctostaphytos. 



Fruit a septicidal capsule; corolla withering-persistent; anthers appen- 

 daged. 12. Calluna. 



1. AZALEA L. 



Flowers expanding before or with the leaves. 1. A. nudiflora. 



Flowers expanding later than the leaves. 



, Leaves shining, glabrous beneath. , ,,/2- A. arborescent. 

 Leaves strigose on the midrib beneath. 3. A. viscosa. 



1. Azalea nudiflora L. Purple Azalea, Pinxter-flower. M. p. 698. Dry 



woods and thickets. Spring. 



la. Azalea nudiflora glandifeRa Porter. 



Delaware— Radnor, Marple (3- Sm.). Lancaster— (P.). Northamp- 

 ton (P.). 



2. Azalea arborescens Pursh. M. p. 698. Woods. Early summer. 



Lancaster— McCall 's Ferry (Br.). 



3. Azalea viscosa L. White Swamp-Honeysuckle. M. p. 698. Swamps. 



Early summer. .;>,- ;. ;< 



3fl, Azalea viscosa glauca Michx. M. p. 699. Swamps. Early summer. 

 ^Philadelphia — Byberry, Mart. (B. C). Dela/ware — Tinicum (St.). 

 Chester — North of Coatesville (St.). Lancaster— {P.). 

 Camden— Atco (Fr.), Delanco (St.). Gloucester— Fairview near Mickle- 

 ' ton (He.), Swedesboro (Li.). Monmouth— Spring Lake (C). 

 New Castle— More rare than A. viscosa. 



36. Azalea viscosa nitida (Pursh.) Britton. M. p. 699. 

 Lancaster— Smithville (P.). Berks— (P.). 

 "Caitiden i-Haddonfield (VP.).' 



