OF ARTS AND SCIENCES. 475 



his tickets Cynomaratham saxat'de. It is therefore the Sesdi Nuttallii 

 of Gray, Proc. Amer. Acad. 8. 287, in hirge part. Geyer's similar 

 specimens, which had been referred by the elder Hoolier to Musenium 

 tenuifolium, Nutt., are also noted in Benth. &, Hook. 1. c. 884 as 

 being a species of Peucedanum. The plant of Parry's collection 

 which was included with Nuttall's under Seseli Nuttallii remains un- 

 certain. It is scarcely a congener of the Seseli HciUii, Gray, described 

 with it. In the very ripe fruit of Parry's specimen the albumen is 

 apparently surrounded by a thin continuous layer of resinous matter, 

 while what appear to be empty vittaj are scattered through the some- 

 what corky pericarp. Seseli Hullii^ which is also the Oreosciadium 

 acaule, Gray, the Deweya (?) acaulis of Torrey, has the fruit of a 

 Carum (as Bentham has stated in a note in herb. Gray), though it 

 differs in habit. 



PoDisTERA * Nevadensis. Obscurely puberulent: caudex with 

 numerous very short crowded branches bearing tufts of leaves : leaves 

 small (3 or 4 lines long), with sheathing petioles, rather thick, the 

 3 to 7 lanceolate segments acute and entire: peduncles very short 

 (9 lines long or less) ; umbels 2 to 4 lines broad, of 3 to 5 umbellets 

 which ar*e either sessile or very shortly pedicellate ; involucels as long 

 as the umbellets : fruit little over a line long, nearly sessile, crowned 

 with the persistent calyx, smooth ; vittte small and flattened, 3 in the 

 intervals and about 6 on the commissure. — Cymopterus (?) Nevadensis, 

 Gray, Proc. Amer. Acad. 6. 536. Near the top of Mt. Dana, Cali- 

 fornia, at 13,000 feet altitude, forming large dense convex mats among 

 the rocks (1739, 2717 Brewer, June, 1863, in flower; 1424 Lemmon, 

 August, 1878, in fruit). 



MiCROSERTS ANOMALA. Low, subcaulescent, sparingly pubescent, 

 with solitary elongated (6 inches long) 1 -flowered peduncles: leaves 



* PODISTERA ; new genus of Umbelliferce, Euamminece. Calyx-teetli promi- 

 nent. Petals lanceolate, acuminate, inflexed. Disk with an undulate margin ; 

 stylopodium depressed ; styles elongated. Fruit elliptic-ovate, somewhat lat- 

 erally compressed ; carpels dorsally compressed, oblong-pentagonal in cross- 

 section, the ribs slender and distant; vittse several in the intervals and on the 

 commissure. Carpophore 2-parted. Seed flat on the face, not sulcate. — A 

 dwarf perennial cespitose acaulescent herb. Leaves pinnately parted. Umbel 

 much contracted, the rays nearly obsolete. Involucre none ; involucels folia- 

 ceous, unilateral, 3-5-cleft, by the reduction of the rays often forming a false 

 involucre. Flowers white or pinkish. 



Most nearly related to Pimpinella, from which it differs in its prominent calyx- 

 teeth and in its whole habit. The name has reference to the entanglement of 

 the pedicels and involucels. 



