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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



regredicaulaceae Fulford, fam. nov. 



Cephaloziaceae auct. p.p. 



Caules variabiles, ramis ventrali-intercalaribus, foliosis vel flagelliformibus. Rhi- 

 zoidea ex amphigastriis. Folia succuba vel transversa, 1-2 filis vel laminis bi-, tri-, 

 vel quadrifidis. Amphigastria reductissima, plerumque ex una serie (raro duabus) 2—4 

 cellularum adjacentium constata, cum vel sine 1-2 uniseriatis segmentis male formato. 

 Inflorescentia masculina amentacea, in ramo ventrali vel in caule, bracteis bracte- 

 olisque foliiformibus. Inflorescentia feminea in ramo brevi ventrali, bracteis bracte- 

 olisque foliiformibus. Perianthium longum, tricarinatum supra. 



Plants small, variable, the branches ventral-intercalary, axillary, leafy, or flagel- 

 liform or short and bearing a male or female inflorescence. Stems with 3-6 rows of 

 cortical cells larger than the cells of the medulla. Rhizoids from the bases of the 

 underleaves. Leaves succubous, or subtransverse to transverse, consisting of 1 or 2 

 short or long filaments, or having a lamina with 2, 3, or 4 segments. Underleaves 

 of 1, rarely 2, rows of 2-4 rows of adjacent cells, with or without an occasional uni- 

 seriate segment. Male inflorescence catkin-like on the stem or on a short ventral 

 branch, the foliaceous bracts and bracteoles like the underleaves. Female in- 

 florescence on a short leafy branch, the bracts and bracteoles bifid to quadrifid to 

 one-half or more. Perianth long, 3-keeled, the third keel ventral. 



Type genus: Regredkaulis Fulford. 



Regredicaulis Fulford, gen. nov. 



Cephalozia auct. p.p. 

 Zoopsis auct. p.p. 



Caules parvi, virides, variabiles, irregulariter ramosi; rami ventrali-intercalares, 

 foliosi, vel longe flagelli formes, vel parvo foliosi; caulis aliquantum complanatus, 

 cortex 4—6 cellulis magnis medullaque 1-3 vel 6-9 cellulis parvis. Rhizoidea ex 

 amphigastriis. Folia oblique inserta, succuba, subquadrata, bifida, brevibus segmentis 

 vel 1-2 cellularis. Amphigastria male formata, plerumque una serie 2-4 cellularum 

 adjacentium. Inflorescentia masculina amentacea, in ramo longo ventrali vel in caule. 

 Inflorescentia feminea in ramo brevi ventrali, bracteis bracteolisque in 3-4 seriebus, 

 bifidis. Perianthium longum, tricarinatum supra, ore 6 laciniis longis. 



Plants small, green, highly variable, in patches or among other bryophytes. Stems 

 to 1 cm or more long, irregularly branched, the branches ventral-intercalary, leafy or 

 variously flagelliform; stem in transverse section of a layer of 3-6 rows of large 

 cortical cells surrounding a medulla of 1-9 smaller cells. Rhizoids from the bases of 

 the underleaves and the base of the female inflorescence. Line of leaf insertion 

 oblique. Leaves subquadrate, bifid (in R. serrus), or of only 1 cell and the slime 

 papilla (in R. monodactylus) , patent. Underleaves of 2-4 adjacent cells across the 

 stem, occasionally of 2 rows and now and then a slime papilla. Plants dioicous 

 and monoicous. Male inflorescence terminal becoming intercalary on the stem or 

 branch, catkin-like, the bifid bracts and the bracteoles in many series. Female in- 

 florescence on a short leafy branch, the bracts and bracteoles in 2 or 3 series, the 

 bracts bifid, the segments acuminate. Perianth cylindrical below, 3-keeled above, 

 the mouth of 6 long lacineae. 



Type species: Cephalozia serra Spruce, 1882. 



Key to the Species 



Plants tiny; leaf 1-, rarely 2-celled, capped with a slime papilla; underleaves 2 cells 



wide. 2. R. monodactylus. 



