The Flora of the Cayuga Lake Basin 343 



2. Centaurium Hill 



1. C. UMBELLATUM Gilib. CENTAURY. 



Roadsides and fields, in gravelly or sandy soils of unknown lime content; rare. 

 June-Sept. 



Sandy field s. of Pout Pond, Junius, 1919 (A. J. E., K. M. IV., & L. F. Randolph). 

 (For other N. Y. stations for this rare weed, see House, Bui. N. Y. State Mus. 254. 

 1924.) 



N. S. and Que., southw. to Mass., N. Y., and 111. Adventive from Eu. 



3. Bartonia Muhl. 

 1. B. virginica (L.) BSP. (B. tenella of Cayuga Fl.) 



In damp places, frequently about bogs, but rarely in sphagnum, mostly in acid 

 sandy soils; scarce. July 25-Sept. 5. 



Hummocks in swampy field, w. edge of Malloryville Bog; "Junius" (in Sart- 

 well Herb., D.) ; sandy edge of marl bogs along path e. of Lowery Ponds, and path 

 along w. edge of Pout Pond; springy places about Botrychium Woods and Miller 

 Bog, Spring Lake; edge of Featherbed Bog. 



N. S. to Minn., southw. to Fla. and La., including the Coastal Plain. 



4. Menyanthes (Tourn.) L. 

 1. M. trifoliata L. Buckbean. 



Very wet and springy soils, both calcareous and noncalcareous ; scarce. May 

 20-30. 



Summit Marsh (D. !) ; one-half mile above Enfield Falls; Freeville (D.) ; Mallory- 

 ville (£>.!); Mud Pond, McLean Bogs (£>.!); near Chicago Bog (D. !) ; Junius 

 (D.) ; s. e. corner of Conquest Township. 



Greenland and Lab. to Alaska, southw. to N. J., Pa., Nebr., and Calif. Found 

 also in Eurasia. 



103. APOCYNACEAE (Dogbane Family) 

 a. Plant trailing; corolla salver-form, blue, hairy in the throat but not appendaged. 



1. VlNCA 



a. Plant erect; corolla campanulate, color white, cream, or pink, appendaged within. 



2. Apocynum 



1. Vinca L. 

 1. V. minor L. Periwinkle. (Incorrectly called "Myrtle.") 



Roadsides and banks, escaped from cultivation ; occasional near yards and 

 cemeteries. May-June. 



Established in Enfield Glen below the falls (D. !) ; Lick Brook; and elsewhere. 

 Ont., Mass., and N. Y., to Ga. Naturalized from Eu. 



2. Apocynum (Tourn.) L. 



a. Flowers paniculate; the main axis of the plant forking and thus soon disappear- 

 ing ; corolla 6-7 mm. long, pink, the lobes revolute ; sepals much shorter than the 

 corolla tube; stem leaves broadly ovate; leaves of the branches oval, pubescent 

 beneath. I. A. androsaemifolium 



(I. Flowers corymbose ; the main axis of the plant conspicuous, plainly overtopped 

 by the branches ; corolla 2.5-4 mm. long, greenish white, the lobes erect ; sepals 

 equaling the corolla tube ; stem leaves oblong or oblong-ovate ; leaves of the 

 branches oval-lanceolate or narrower, glabrous or pubescent. 



