No. 3, April, 1921] TAXONOMY OF VA.SCULAR PLANTS 329 



2240. Smith, J. J. Orchidaceae novae malayenses IX. [New orchids of the Malayan 

 region.] Bull. Jard. Bot. Buitenzorg III, 2: 15-127. 1920. — The following new species are 

 described: Apostasia ellipHca, A. platystylis, Corysanlhes sumalrana, C. bancana, Didymo- 

 plexis Trichechus, Vanilla abundiflora, V. sumatrana, Vrydagzynea deliana, Coelogyne brachy- 

 gyne, C. imbricans, Dendrochilum Gravenhorstii, D. polluciferum, D. rigidifolium, Liparis 

 mentaweiensis , L. foetulenta, Podochilus bilabiatus, P. bancanus, Appendicula brevimentum, 

 Agrostophyllum sumatranum Schltr. & J. J. S. var. borjte.ense, A. conjusum, Ceratostylis 

 crassipetala, C. Jacobsonii, C. tricallifera , Phajus callosus Lndl. var. sumatranus, P. pauci- 

 flortis Bl. var. sumatranus, P. pauciflorus var. punctatus, P. corymbioides Schltr., P. labiatus, 

 Eria taluensis, E. compressa Bl. var. sumatrana, E. Jenseniana, E. Kieuwenhuisii, E. ober- 

 oniiflora, E. bancana, E. mentaweiensis, E. rubifera, E. scotiifolia, Dendrobium flabelloides, 

 D. denigratum, D. labangense, D. maculosum, D. forcipatum, D. xantholeucu7n Rchb. f. var. 

 obtusilobum, D. stelidiiferum, D. dempoense, D. quinquecallosum, D. Ruttenii, D. Laurensii, 

 D. taurulinum, D. Demmenii, D. croceocentrum, D. Maierae, D. cinereum, D. Groeneveldtii, 



D. grastidioides, D. fimbrilabium, D. septemcostulatum, D. tetrodon Rchb. f. var. Vanvuurenii, 

 Bulbophyllum javanicum var. sumatranum, B. rigidifilum, B. farinulentum, B. crepidiferum, 

 B. fibrosum, B. dempoense, B. silapingense, B. lemniscatoides Rolfe var. exappendiculatum, 

 B. Theunissenii, B. lumbriciforme, B. Groeneveldtii, B. osyriceroides, B. trichoglottis Ridl. 

 var. sumatranum, B. elevatopuncatum, B. lepidum var. insigne, B. campanulatum Rolfe var. 

 inconspicuum, B. viscidum, Sarcochilus bipennis, S. decipiens, Thrixspermum aurautiacum, 

 T. sumatranum, T. longilobum, T. latisaccatum, T. flaccidum, Saccolabium longicaule, Ade- 

 noncos unijlora, Arachnis Vanmullemii, Malleola baliensis, Robiquetia Hansenii, R. viridi- 

 rosea, Pomatocalpa simalurense, Microsaccus canaliculatus. — J. J. Smith. 



2241. Staff, O. Thellungia, a new genus of Gramineae. Bull. Misc. Inf. Kew 1920: 

 96-99. Fig. 1-11. 1920. — This grass probably of Australian origin, was found in the vicinity 

 of Solothurn, Switzerland, near a woollen mill. It is made the type of a new genus, Thel- 

 lungia, related to Sporobolus. T. advena is its only known representative. — E. Mead Wilcox. 



2242. Staff, O. Setaria or Chaetochloa. Bull. Misc. Inf. Kew 1920: 124-127. 1920.— 

 Chaetochloa was proposed by Scribner to replace the name Setaria for two reasons. Setaria 

 was, according to him, first applied by Beauvois to a species of Pennisetum and furthermore 

 at an earlier date was employed by Acharius to a genus of lichens. It is shown that Ar-hariua 

 used this name not as a generic one but to designate a tribe. It is further shown that the 

 plant understood by Soribner to be the type of the genus is really a Setaria and not a Penni- 

 setum. But this species is after all not the type of the genus. The type must be taken as 

 S. viridis, which was first used by Beauvois as illustrating the genus Setaria. This species 

 is also a true Setaria. — E. Mead Wilcox. 



2243. St. John, Harold. The genus Elodea in New England. Rhodora 22:17-29. 

 1920. — The writer gives a key to the New England species of the genus Elodea of Miohaux, 

 synonymous with the genus Philotria of Rafinesque and adopted by Rydberg. All of the 

 material is put into four species, E. canadensis Michx., E. occidentalis (Pursh) St. John, 



E. Nuttallii (Plannhon) St. John, and E. Planchonii Casoary. The synonymy and bibliog- 

 raphy, list of illustrations, and distribution of each of these is given. The article also includes 

 a discussion of the flower structure of E. canadensis and the history of its rapid spread in 

 Europe and the British Isles; a description of pollination in E. occidentalis; and discussions 

 as to the validity of other species proposed by various authors. — James P. Poole. 



2244. St. John, Harold. Trillium rectistamineum, a valid species of the southeastcn 

 United States. Rhodora 22 : 78-79. 1920. — Trillium lanceolatum Boykia var. rectistamineum 

 Gates is raised to specific rank. The name as published is Trillium rectistamineum (Gates) 

 comb. nov. A bibliography and description are given. — James P. Poole. 



2245. St. John, Harold,, and Donald White. The genus Galinsoga in North America. 

 Rhodora 22:97-101. ]920. — A synopsis of the North American species of this genus as 

 understood by the authors. The species are distinguished especially by differences in the 

 pappus of the ray- and disc-flowers. — James P. Poole. 



