ERICACEAE 237 



Delaware ; Chester ; Lancaster ; York ; Blair ; Columbia ; Al- 

 legheny. 



Family 3. MONOTROPACEAE Lindl. Indian Pipe Family. 

 Corolla of united petals, persistent. i. Ptbrospora. 



Corolla of distinct deciduous petals. 



Flowers solitary : plant white, drying black. 2. Monotropa. 



Flowers racemose : plant yellowish or red. 3. Hypopitys. 



1. PTBROSPORA Nutt. 

 1. Pterospora Andromedea Nutt. Giant Bird's-nest. Pine-drops. 

 (Man. p. 695 ; 1. F./. 2'/sy.) In rich woods, Quebec and N. H. to Pa., 

 B. C. and Calif., south in the Rocky Mts. to Ariz. — Pennsylvania : 



2. MONOTROPA L. 



1. Monotropa uniflora L. Indian Pipe. (Man. p. 696; I. F./. 27^9.) 

 In moist rich woods, Anticosti to Fla., B. C. and Col. Also in Japan and 

 the Hitnalayas. — Pennsylvania : Northampton ; Bucks ; Delaware ; 

 Chester ; Lancaster ; Columbia ; Franklin ; Huntingdon ; Alle- 

 gheny ; Erie. 



3. HYPOPITYS Adans. 



1. Hypopitys Hypopitys (L.) Small. Pine-Sap. False Bebch- 

 DROPS. (Man. p. 693 ; I. F. f. 2740.) In dry woods, Anticosti to Fla., 

 B. C. and Ariz. Also in Eu. and Asia. — Pennsylvania : NORTHAMPTON ; 

 Bucks ; Montgomery ; Delaware ; Chester ; Lancaster ; Luzerne ; 

 Dauphin ; Franklin ; Fulton ; Centre ; Crawford ; Allegheny. 



Family 4. ERICACEAE DC Heath Family. 

 Fruit a septicidal capsule : anthers unappendaged. 

 Petals distinct. i. Ledum. 



Petals more or less united. 

 Corolla slightly irregular : seeds flat, winged. 

 Stamens exserted : corolla funnelform to campanulate. 

 Lower lip of the corolla divided to the base. 2. Rhodora. 

 Lower lip of the corolla not divided. 

 Corolla funnelform : leaves deciduous. 3. Azalea. 



Corolla campanulate : leaves persistent. 4. Rhododendron. 



Stamens included : corolla urn-shaped. 5. Menziesia. 



Corolla regular : seed rounded or angled. 6. Kalmia. 



Fruit a loculicidal capsule, sometimes inclosed in the fleshy hypanthiam or 

 a drupe. 

 A. Fruit a dry capsule : calyx or hypanthium not essentially accrescent, 

 a. Anther-sacs opening by terminal pores or chinks. 

 Sepals imbricated at least in the bud. 

 Capsules opening by a simple layer of 5 valves. 



7. Leucothoe. 

 Capsule opening by two layers, the outer 5-valved, the inner lo-valved. 



8. Chamaedaphne. 

 Sepals valvate or separated in the bud. 



* Anthers with two awn-like appendages on the back. 

 Corolla cylindric or urn-shaped. 9. Pieris. 



Corolla globular. 10. Andromeda. 



