246 FLORA OF PHILADELPHIA. 



Family 4. ERICACEAE DC. Heath Family. 



Fniit 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. Bhododendron. 



Corolla regular; seeds angled or rounded. 



Corolla polypetalous. 3. Dendriwn. 



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. Chaviaedaphne. 



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

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



Anthers awnless. 7. Xolisma. 



Anther-sacs longitudinally dehiscent. 9. Epignea. 



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

 Fruit consisting of the fleshy calyx, surrounding the capsule. 



10. Gaultheria. 

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



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 lat-er 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-fiower. M. p. 698. Dry 



woods and thickets. Spring. 



la. Azalea nudiflora glandifera Porter. 



Delaware— RadaoT, Marple (B. Sm.). Lajicaster— (P.). Northamp- 

 ton (P.). 



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



Lancaster— MaCaW's Ferry (Br.). 



3. Azalea viscosa L. White Sicamp-HoveysucTcle. M. p. 698. Swamps. 



Early summer. 



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



Philadelphia — BjhevT J, Mart. (B. C). Delaware — Tinicum (St.). 

 C/iester— North of Coatesville (St.). Lancaster— (P.). 



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

 ton (He.), Swedesboro (Li.). MonmouthSprmg Lake (C). 



New Castle — More rare than A. viscosa. 



:^h. Azalea viscosa nitida (Pursh.) Britton. M. p. 699. 

 Lancaster— Smithville (P.). Berfcs— (P.). 

 Camden — Haddonfield (VP.). 



