290 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



still in bloom, so that both flowers and fruits were collected. A careful 

 examination of this material shows that it is abundantly distinct from 

 JIarperella nodosa. It is much nearer the species from Alabama, but 

 surely specifically distinct, and hence it is described as new. 



Harperella vivipara Rose, sp. nov. 



Stem annual (?), slender and weak, at first erect, afterwards somewhat spreading, 

 10 to 30 cm. long, usually simple or sometimes with one or two branches, in age throw- 

 ing out bulblets from the axils of all the leaves; basal leaves 2 or 3, 4 to 8 mm. long, 

 terete, jointed, bright green, glabrous, hollow, with ascarious stipular sheath at base; 

 stem leaves similar but shorter, alternate, shorter than the internodes; inflorescence 

 consisting of a terminal umbel, with or without a second axillary one; peduncle 1 to 

 4 cm. long; rays 3 to 10 mm. long; involucre, if present, consisting of a single small 

 bract; bractlets of the involucels 4, minute; flowers white; stylopodium conical; 

 fruit 1.25 mm. long, broader than long. 



Type U. S. National Herbarium no. 640627, collected by J. N. Rose near Han- 

 cock, Md., October 5, 1910. 

 Specimens examined: 



Maryland: Near Hancock, on the banks of the Potomac River, July, 1905 

 Forrest Shreve; same locality, October 5, 1910, J. N. Rose. 



Harperella fluviatilis Rose, sp. nov. 



Stems said to be biennial, from a dense cluster of yellow roots, with an umbelliferous 

 odor, erect, 20 to 25 cm. high, more or less bulbiferous; leaves nodose, "evergreen," 

 terete, 10 to 15 cm. long; inflorescence of 1 to 3 umbels; rays 8 mm. long; involucre 

 and involucel bractlets several, minute; flowers white, fruit oblong, 1.5 mm. long. 



Type U. S. National Herbarium no. 51421, collected on Town Creek, Sand Moun- 

 tains, nearChavres, De Kalb County, November 24, 1905, R. M. Harper 8. 

 Specimens examined: 



Alabama: Rocky bed of Town Creek, type collection; rocky bed of Little River, 

 on Lookout Mountain, De Kalb County, November 25, 1905, R. M. Harper. 



