NATURAL SCIENCES OF PHILADELPHIA. 455 



Stems 1 2 feet long, with many branches; leaves of the branches } an inch 

 long, terminina-ting rather abruptly at both ends ; flowers nearly 2 inches long, 

 and the diameter of the expanded petals 1<] inches. 



(Eoothera (Onagra) L eo n a, s. nov. Parum pulverulenta-pilosa; foliis ovato- 

 lanceolatis; longe acuunnatis, sessilibus, parce dentatis, aentibus minutis, 

 floribus magnis, plurimis ; spicis striatis, elongatis; bracteis lanceolatis, acumi- 

 natis ; calyce tubo lineari-elongata, petalis ovato-lanceolatis, acutis, capsulis 

 elongatis, subquadrangulatis, hirsutis, arcuatis. 



Near Leon River. June. 



Stems simple, lj 2 feet high ; capsules sessile, k an inch long; upper leaves 

 somewhat clasping, those near the root attenuate almost to a petiole ; stems and. 

 leaves subpilose, with short white, appre*ssed hairs; leaves 1| 2J inches long; 

 flowers nearly 2 inches long and H broad. 



Loasace^. 



Mentzelia (Eumentzelia) p e t i o 1 a t a, s. nov. Caule decumbente, ramosis 

 sime, fuliis ovatis, parce grandi-dentatis, acuiis, ad basi subcuneatis, longe 

 petiolatis ; segmentis calycis subulatis, corolla parum longior, petalis subovatis, 

 acutis; capsulis breviter clavatis, canescenti-hirsutissimis. 



Llano County. June. 



Stems 2 2J feet long; petioles 1 1J inches long; capsules J an inch in 

 length. Whole plant rough-pubescent, with the adherent stems and leaves 

 peculiar to the genus. 



Saxifragacea. 



Saxifraga (Micranthis) T e x a n a, s. nov. Foliis omnibus radicalibus, glan- 

 duloso-pubescentihus , onovatis, integris. breviter lato-petiolatis ; caule siiuplice, 

 parce pubescenti ; bracteis linearis, vel subspathulatis ; floribus panicuiato- 

 cymosis, sepalis ovatis, suhacutis, petalis spathulato-obovatis ; calyee parum 

 longioribus. 



Prairies Noitheastern Texas. March. 



4 6 inches high. Leaves nearly sessile, and, including petiole, f 1 inch 

 long, obtuse and about an inch wide. 



UMBELLIFERjE. 



Cymopteribus (Eucymopteris) m a c r o r h i z u s, s. nov. Glaucus ; radix na- 

 piformis, caulis erectis ; foliis pinnati-decoropositis, divisionibus confluentibus ; 

 foliorum segmentis plurimis, ovatis, seu subovatis, obtusis, vel subacutis, in- 

 volucellis 5 7-partitis, lobis lanceolatisve ovatis, membranaceis, laciniatis. 



Prairies north of Austin. Last of March. 



6 8 iDches high ; root 1 2 inches in diameter; caudix 1 2 in. high; 

 leaves long petioled, oblong ovate in outline, the somewhat winged petiole 

 expanding into leaflets, which are 8 10 lobed ; petioles of the outer leaves 

 widening near the base, and clasping the stem ; leaves 2 3 inches long ; peti- 

 oles 1 2 inches in lecgth; fruit 3 lines long; wings wide and thin. 



Eurytenia macrophylla, s. nov. Tota glahra ; umbellis magnis, 10 14 

 longe radiatis ; involucrum e foliolis parvis 3-sectis ; segmentis longe linearis 

 involucellum e foliolis numerosis, 3-fidis, laciniis, linearis, acutis, petalis albis, 

 lato obovatis, emarginatis; foliis caulinis superiores pinnati sectis, segmentis 

 elongato-linearis ; inferiores pinnatis, 2 3-jugis ; foliolis ovatis inequaliter 

 magna-dentatis, seu lanceolatis, dentibus mucronatis ; foliis radicalibus peti- 

 olatis, 3 5 lobis segmentis ovatis. 



Washington County. Dr. Linsecom. 



Lower cauline leaves 3 4 inches in length ; leaflets sessile or clasping, 

 about an inch and a half in length and an inch wide; petioles ljj 2 inches 

 long; rays of the umbel 2 3 inches. 



1861.] 



