346 PROCEEDINGS OF THE AMERICAN ACADEMY 



pophorum bifidum. — Herbte perennes, glaberrimse, subsimplices ; foliis 

 pinnatim vel subternatim decompositis, segmentis linearibus angustis ; 

 umbellis longe pedunculatis pluri-radiatis, terminali fertili, lateralibus 

 masculis, involucris et involucellis e bracteis plurimis subscariosis line- 

 aribus seu lanceolatis setaceo-acuminatis. — A nearly allied plant, 

 probably, is No. 6 of Hartweg's Mexican collection, doubtfully appended 

 to Oreomyrrhis by Bentham ; but it has a simple umbel and obtuse 

 nearly plane petals. 



Podosciadium Californicum ( Chcerophyllum ? Calif or nicum,Torr. 

 Bot. Whipp. Exped. p. 37) : caule 3 - 4-pedali ; segmentis foliorum 

 planis ; umbellis 9 - 12-radiatis ; calycis dentibus stylopodiisbreviori- 

 bus ; petalis acumine involuto obtuso ; fructus jugis filiformibus obtu- 

 sis ; semine sub vittis in valleculis solitariis magnis pi. m. sulcato. — 

 Knight's Ferry, Stanislaus River, Dr. J. M. Bigelow. 



Podosciadium Bolanderi : caule 2 - 3-pedali superne longe 

 nudo ; foliis plerisque subradicalibus, segmentis angustissime linearibus 

 fere filiformibus ; umbellis multiradiatis ; involucelli bracteis angustis 

 tenuiter aristatis pedicellos subrequantibus ; calycis dentibus petalis 

 acumine attenuato inflexo subdimido triplove brevioribus ; fructus 

 jugis angustissimis elevatis ; vittis in valleculis binis obscuris. — Mari- 

 posa Trail, Yosemite, Bolander. This cannot well be other than a 

 close congener of the preceding : the only doubt comes from the pair 

 of vittae in the intervals, which, however, are rather obscurely marked 

 in the thin pericarp, although the seed is well formed. Fruit much 

 smaller than in P. Californicum, only a line and a half long ; the 

 ribs exceedingly narrow, but sharp and salient. Calyx-teeth ovate- 

 subulate, as thin and delicate as the petals. 



MYRRHIS § GLYCOSMA. (Glycosma, Nutt.) Fructus juga 

 kevia, baud alreformia. Styli brevissimi. Involucellum nullum. Fo- 

 liola pauciora, latiora, minus incisa. 



M. occidentals (G. occidentale, Nutt.): subpuberula ; foliolis 

 oblongis sublanceolatisve serratis raro incisis ; pedicellis fructiferis 

 fiores sterilia subsuperantibus ; jugis fructus acutis. 



M. Bolanderi : subpubescens ; foliolis ovatis magis incisis ; pedi- 

 cellis fructiferis floribus sterilibus brevioribus; jugis obtusis. — At 

 Lambert's Lake, Mendocino Co., Bolander. Leaflets more numerous 

 than in Nuttall's species, and more like those of Osmorrhiza. 

 Pedicels of the fruit only a line and a half long. — Bentham and 

 Hooker have characterized the genus Myrrhis upon M. odorata alone, 



