228 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Fraxinus pennsylvanica Marsh. Red ash. 



Moist woods. Apr-May. Eastern U. S. (F. pubescent Lam.) 

 4a. Fraxinus pennsylvanica lanceolata (Borckh.) Sarg. Green ash. 



Swamps and along streams. May. Eastern U. S. (F. viridis Michx. f.) 



2. IIGUSTRUM L. 

 1. Ligustrum vulgare L. Privet. 



Used for hedges; rarely escaped from cultivation. June. Eur. and Asia. 



3. CHIONANTHUS L. 



1. Chionanthus virginica L. Fringetree. 



Swamps, low woods, and along streams, sometimes on rocky hillsides. May; fr. Aug. 

 Southern states, north to N.J. 



125. LOGANIACEAE. logania Family. 



Corolla red outside, yellow within, 2.5-5 cm. long; leaves ovate 1. SPIGELIA. 



Corolla white, about 2 mm. long; leaves linear 2. POLYPREMTJM . 



1. SPIGELIA L. 



1. Spigelia marylandica L. Indian fink 



Reported by Holm as collected in a moist thicket in the vicinity of Mount Vernon. 



Va. to Tex. 



2. POLYPREMTJM L. 



1. Polypremum procumbens L. 



Kenilworth, August, 1S98 (Steele); reported by Holm from Marshall Hall. South- 

 eastern U. S. to Mex., and W. Ind. 



Probably adventive in the District. 



126. GENTIANACEAE. Gentian Family 



Leaves all reduced to small scales; corolla 3-4 mm. long, yellowish white. Flowers 

 on long slender pedicels. 1. BARTONIA. 



Leaves, at least part of them, normal, with broad blades; corolla 1 cm. lorn? or longer. 

 Lower leaves reduced to scales, the upper ones broadly wedge-shaped; plants 15 

 cm. high or smaller, perennial, flowering in the spring; corolla about 1 cm. 

 long, white or tinged with purple, the tube about as long as the lobes. 



2. OBOLARIA. 

 Lower leaves similar to the upper ones, not reduced, the upper ones never wedge- 

 shaped; plants usually 20 cm. high or often much larger, flowering in summer 

 or autumn; corolla or its lobes distinctly over 1 cm. long. 

 Corolla lobes several times longer than the very short tube, spreading, normally 



pink; flowers on long pedicels; plantH annual 3. SABBATIA. 



Corolla lobes much shorter than the tube, erect or nearly so, greenish white, 

 blue, or purple; flowers sessile or nearly so; plants perennial. .4. GENTIANA. 



1. BARTONIA Muhl. 



Corolla lobes very obtuse, sometimes abruptly short-pointed, finely toothed; calyx 



lobes nearly as long as the corolla; branches erect 1. B. virginica. 



Corolla lobes acute, entire; calyx lobes half as long as the corolla; branches ascending. 



2. B. paniculata. 

 1. Bartonia virginica (L.) B. S. P. 



Sphagnum bogs; rare; known definitely from the Terra Cotta and Paint Branch 



swamps and the vicinity of the Reform School. July-Aug. Eastern N. Amer. 



(B. tenella Muhl.) 



