46 TAXONOMY OF VASCULAR PLANTS [Bot. Absts., Vol. VI, 



and assigning to each a separate term." He points out the following different kinds of varie- 

 ties, and suggests a nomenclature for each: freaks, to be described separately; geographical 

 forms, the trinomial system; edaphic forms, "the term varietas followed by the ordinary 

 ecological term such as xerophytica, halophytica, etc.;" forms of varying life duration, "varie- 

 tas annua, biennia, etc.;" seasonal forms, "varietas hyemalis, aestivalis, etc.;" pure lines and 

 elementary species, "varietas Mendeliana, followed by the letters of the Greek alphabet;" 

 forms of inconstant species and "DeVriesian mutants," "forma is the ultimate unit;" and 

 hybrids, "the usual multiplication sign." — W infield Dudgeon. 



320. Wilson, E. H. The Liukiu Islands and their ligneous vegetation. Jour. Arnold 

 Arboretum 1 : 171-186. 1920. 



PTERIDOPHYTES 



321. Bonaparte, R. Les pteridophytes de l'lndo-Chine. Premiere partie. [The Pteri- 

 dophytes of Indo-China. Parti.] Notes Pteridologiques 7: 1-190. 1919. — This work contains 

 an analytical key to the families of ferns and fern-allies, and a consideration of the Indo- 

 Chinese representatives of the families Hymenophyllaceae, Gleicheniaceae, Schizaeaceae, 

 and Cyatheaceae, with descriptions of the genera and species, keys, and an extended citation 

 of synonyms and specimens under each species. To the work is appended a list of the ferns 

 cultivated in the botanical garden at Saigon. No new forms are described. — E. D. Merrill: 



322. Copeland, E. B. A few new ferns from Mt. Bulusan. Lead. Philippine Bot. 9: 

 3107-3111. 1920. — The following ferns from Luzon are described as new: Davallia Elmeri, 

 Dennstaedtia philippinensis, Cyathea bicolana, C. bulusanensis, and Athyrium ebenirachis. 

 The genus Haplodictyon as proposed by Presl, long placed as a synonym of Dryopteris, is rein- 

 stated, and H. majus is described as new. — E. D. Merrill. 



323. Dodge, Raynal. Aspidium cristatum X marginale and A. simulatum. Amer. 

 Fern Jour. 9: 73-80. 1919— See Bot. Absts. 5, Entry 353. 



324. Fitzpatrick, T. J. The fern flora of Nebraska. I. Amer. Fern Jour. 10: 5-15. 

 1920. 



325. Holloway, J. E. Studies in the New Zealand species of the genus Lycopodium: 

 Part III. The plasticity of the species. Trans, and Proc. New Zealand Inst. 51 : 161-261. PL 

 9-14, 16 fig. 1919— See Bot. Absts. 5, Entry 1892. 



326. Hopkins, L. S. A crested form of the Lady fern. Amer. Fern Jour. 9: 86-88. PI. 

 4. 1919. — In the summer of 1916 the author found near Windham, Ohio, a crested form of 

 the Lady fern. He lifted the plant and has it growing at his home in Kent, Ohio. He sug- 

 gests the name Athyrium angustum var. cristatum var. nov. for this form. — F. C. Anderson. 



327. Leonard, Elizabeth J. The genus Taenitis, with some notes on the remaining 

 Taenitidenae. Sci. Proc. Roy. Dublin Soc. 15: 254-273. 1 pi. 1918.— This genus comprises, 

 at present, but one species, Taenitis blechnoides, Willd. Related genera include Eschato- 

 gramme, Drymoglossum, Paltonium and Hymenolepsis. The author concludes that all, except 

 possibly Paltonium, are blechnoid derivatives. — A. E. Waller. 



328. Lewis, Charles Smith. The Woodsias of Quechee. Amer. Fern Jour. 10: 23-25. 

 1920. 



329. Maxon, William R. Notes on American ferns. XIV. Amer. Fern Jour. 9: 67-73. 

 1919.— Dicranopteris flexuosa (Schrad.) Underw., the only known representative of the family 

 Gleicheniaceae in the United States, found in 1914 growing near Delschamps Station in the 

 Mobile Bay region of Alabama, is probably wiped out of existence by the railroad company 

 removing the clay bank on which the fern grew. The locality data for Athyrium americanum 



