ERICACEAE 237 



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

 legheny. 



Family 3. MONOTROPACEAE Lindl. Indian Pipe Family. 

 Corolla of iinited petals, persistent. i. Pterospora. 



Corolla of distinct deciduous petals. 



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



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



1. PTEROSPORA Nutt. 

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

 (Man, p. 695 ; I. F. y. 2JJ7.) 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. /. 2739. ) 

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

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

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

 gheny ; Erie. 



3. HYPOPITYS Adans. 



1. Hypopitys Hypopitys tL- ) Small. Pine-sap. False BeEch- 

 drops. (Man. p. 693; I. F. f. 2J40.) 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 b}' 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. Chamaedaphnb. 

 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. 



