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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



2. Pteropsiella serrulata Spruce ex Stephani, Spec. Hep. 3: 276. 1908. 



Pteropsiella serrulata Spruce, Hep. Sprue, in Hl>. 



Pteropsiella metzgeriaejormis Schuster, Nova Hedwigia 10: 25. 1965. 



Thallus prostrate, olive-green to dark green, 1-3 cm long, 3-5 mm wide, some- 

 times becoming flagelliform at the tip, the axis flattened dorsally, of 2 rows of 

 large cells between the unistratose wings, the long narrow slime papillae parallel to 

 the closely serrate margin; branches ventral-intercalary in the axils of the few-celled 

 underleaves (more rarely lateral, of the Frullania-type, "forking"), forming a winged 

 thallus, a flagelliform branch or a short sexual branch. Rhizoids associated with the 

 underleaves. Wing margin irregular, closely serrate, of smaller thick-walled cells, the 

 elongate slime papillae numerous, parallel to the margin, to 117 long; cells of the 

 wing mostly 85-136 /j. long, 35 n wide, thin-walled, without trigones, cells of the 

 margin 32-39 X 26 /x, thick-walled, the cuticle verruculose. Underleaves of 1 or 2 

 rows of 2 or 4 cells. Plants monoicous. Male inflorescence long, spike-like, foli- 

 aceous, terminal on the thallus which had become flagelliform or on a ventral sexual 

 branch; bracts in 8-12 series, bifid or refuse, monandrous, the bracteoles of only a 

 few cells. Female inflorescence a short ventral branch, the bracts and bracteoles 

 bifid, the segments laciniate. Perianth long, cylindrical below, 3-keeled above, the 

 mouth of 6 ciliate segments. Sporophyte not seen. 



PI. 102. Fig. 2, a-d. 



Habitat: Unknown. 



VENEZUELA: Orinoco, Liitzelburg 22319/2 (S-PA). 



BRAZIL: San Gabriel et S. Carlos, Spruce, Hep. Sprue. (G-13449), packets labeled P. jrondi- 

 jormis (NY) ; fl. Negro et Uaupes, Spruce, Hep. Sprue, (isotype NY) ; same locality, Spruce, Hep. 

 Sprue, as P. metzgeriaejormis (NY). 



hyalolepidoziaceae Fulford, fam. nov. 



Caules erectiusculi, plus minusve radiales; rami terminales (typus Frullaniae et 

 Microlepidoziae) , vel laterales vel ventrali-intercalares, axillares; caulium cortex 6 

 seribus magnarum cellularum medullaque cellularum parviorum. Rhizoidea e basi 

 amphigastriorum. Folia subtransverse inserta. Folia amphigastriaque similaria, bi- 

 fida. Inflorescentia masculina terminalis vel intercalaris. Inflorescentia feminea in 

 ramo brevi ventrali, bracteis bracteolisque bifidis. Perianthium cylindricum, 3-cari- 

 natum, carina tertia ventrali. 



Leafy stems radially symmetric or nearly so, irregularly branched; branches 

 terminal, of the Frullania and Microlepidozia types, or lateral- or ventral-intercalary, 

 axillary, leafy or as flagelliform-stolons; stem in transverse section of 6 very large 

 thin-walled cortical cells surrounding a medulla of small cells. Rhizoids from the 

 bases of the underleaves. Leaf insertion transverse or subtransverse. Leaves and 

 underleaves similar, bifid, the underleaves sometimes slightly smaller. Male in- 

 florescence terminal becoming intercalary on the stem, the bracts and bracteoles 

 similar, slightly smaller than the leaves and underleaves. Female inflorescence on 

 the stem or a branch, the bracts and bracteoles bifid. Perianth cylindrical below, 

 3-keeled above, the third keel ventral. 



Type genus: Hyalolcpidozia S. Arnell ex Grolle, 1963. 



