TWO NEW UMBELLIFEROUS PLANTS FROM THE COASTAL 

 PLAIN OF GEORGIA. 



By J. N. Rose, 



Associate Curator, Division of Plants. 



The two new plants described below were collected by Mr. Roland 

 M. Harper in the course of his extensive study of the flora of Georgia. 

 The new genus, which I have founded upon one of them and have 

 named in Mr. Harper's honor, is a very peculiar one. The fruit nnich 

 resembles that of Carum^ while the leaves are reduced to hollow-jointed 

 phyllodia somewhat like those of OxypoJls Jillfonnis.^ but in other 

 respects the plant is unlike both. 



HARPERIA Rose, gen. nov. 



Calj'x teetn present, small, persistent. Fruit flattened laterally, 

 shortl}^ oblong- in outline, rounded at both ends, glabrous; carpels 

 hardly flattened, terete or somewhat angled in section; ribs rather 

 prominent for the size of fruit, equal; stylopodia conical; st3'les slen- 

 der. Oil-tubes solitary in the intervals, two on the couunissural 

 side. Seeds nearly terete in section. 



A smooth aquatic perennial without normal leaves but bearing 

 instead slender terete-jointed phyllodia, with very inconspicuous invo- 

 lucre and involucral bractlets, and white petals. 



HARPERIA NODOSA Rose, sp. nov. 



Stems erect, branching, fluted, lUO to 120 cm. high; basal and lower 

 stem leaves 20 to -10 cm. long; peduncles slender, 2 to 4 cm. long; 

 rays 5 to 15. 



Collected by Roland M. Harper, in shallow exsiccated pond near 

 Ellaville, Schley County, Georgia, July 10, 1902, in fruit (no. 1-111, 

 type); and in large shallow pine-barren pond between Pinehurst and 

 Unadilla, Dooly County, May 21, 1904, in flower (no. 2220). 



The type sheet is no. 514914 in the U. S. National Herbarium. 



Explanation of plate III. — Fig. ^?, plant, natural size; J, fruit; c, 

 cross section of carpel— J and c enlarged ten times. 



Proceedings U. S. National Museum, Vol. XXIX— No. 1428. 



441 



