No. 2, December, 1921] 



TAXONOMY, VASC. PLANTS 



129 



concerned, it may be simply a hybrid between S. cernua and S. gracilis. In Texas, however, 

 great difference in the seasons of anthc.^is of the supposed parents appears to render such a 

 crossing improbable. The hybrid form is fully described and illustrated. Pollination in 

 ^Spiranthes is discussed. The writer comments upon Rudolf Schlechter's revision of the Spiran- 

 theae as related to the American species, discussing the nomenclature of S. Amesiana Schltr., 

 S. ovalif^ Lindl., S. plantaginea (Raf.) Torr., and tabulates the changes made necessary by this 

 revision in the nomenclature of several American species that are native of the U. S. A. These 

 species as they now stand are: Mesadenus lucayanus (Britton) Schltr., Cyclopogon cranich- 

 loides (Grieseb.) Cogn., Centrogenium setaceum (Lindl.) Schltr. Stenorrhynchus is retained in 

 the original conception of that genus; representatives are found in the southern U. S. A. — 

 James P. Poole. 



817. Blake, S. F. A new Aspilia from Trinidad. Proc. Biol. Soc. Washington [D. C] 

 34: 119-120. 1921. — Aspilia nigropiinctata is described as a new species. — /. C. Gilman, 



818. Blake, S. F. New Meliaceae from Mexico. Proc. Biol. Soc. Washington [D. C] 

 34: 115-118. 1921. — Cedrela ciliolala, Guarea chiapensis, G. excelsa dubia, G. hetrophylla, 

 and G. polyantha are described as new species. — /. C. Gilman. 



819. Blatter, E., F. Hallberg, and C. McCann. Contributions towards a flora of Balu- 

 chistan. Jour. Indian Bot. 1: 344-352. 1920. — This is the final installment of the flora of 

 Baluchistan which the authors have been working up according to Bentham and Hooker's 

 classification from collections made by Col. J. E. B. Hotson, and includes the families Urti- 

 caceae to Coniferae. Throughout the entire work localities of collections are detailed, and 

 time of flowering and fruiting, vernacular names, and uses of the plants are given when 

 known. The entire flora includes: 



The largest families are: Cruciferae, 12 genera and 23 species; Leguminosae, 28 genera and 55 

 species; Compositae, 23 genera and 37 species; Asclepiadaceae, 11 genera and 13 species; 

 Labiatae, 11 genera and 18 species; Chenopodiaceae, 9 genera and 20 species; and Gramineae, 

 30 genera and 41 species. The Gymnosperms are represented by Ephedra, 3 species; and 

 Juniperus, 1 species. [See also Bot. Absts. 6, Entries 342, 343.] — Winfield Dudgeon. 



820. Danser, B. H. Bijdrage tot de kennis van eenige Polygonaceae. [Contribution to 

 the knowledge of some Polygonaceae.] Nederland.Kruidk. Arch. 1920:208-250. Ifig. 1921. — 

 This article contains notes about Dutch Polygonaceae and the description of a new Rumex, 

 R. obovatus, closely allied to R. pulcher, which is only adventive in the Netherlands. Besides, 

 the following new varieties are described: Polygonum amphibiuin var. brachystylum, var. 

 macrostylum, var. pallidiflorum, varroseiflorum; P. Persicaria var. glabripes; Rumex Acetosa 

 var. albida, var. androgyna, var. feminea, var. musculo, var. rubida, var. rubra; R. Acetosella 

 var. rubella, var. rubida, and a new name, R. callianthemus {R. obiusifolius X mai-iiimus). — 

 W. H. Wachter. 



821. Druce, G. C. Potamogeton Drucei Fryer in Fryer's correspondence. 

 Exchange Club British Isles Rept. 5: 71.3-718. 1919 [1920]. 



Bot. Soc. and 



822. Druce, G. C. [Rev. of: Beauvard, Gustave. Monographic du genre Melampy- 

 rum. Mem. Soc. Phys. et Hist. Nat. Geneve 38: 290-656. 25 fig. 1916.] Bot. Soc. and Ex- 

 change Club British Isles Rept. 5: 66-68. 1917 [1918]. 



