8 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN | VOL. 10 



IIOOKERIACEAE 



Daltonia tenuifolia Mitt. 



VENEZUELA: Bolivar: Chimanta Massif, along west branch of headwaters of Rio 

 Tirica above Upper Falls, alt. 2090 m, Steyermark Sr Wurdack 895. New to Venezuela. 



Previously known from Costa Rica, Ecuador, and Bolivia. 

 Adelothecium bogotense (Hpe.) Mitt. 



VENEZUELA: Bolivar: Chimanta Massif, forested slopes below western escarpment of 

 Torono-tepui, alt. 1970 m, Steyermark Sr Wurdack 706. 



Cyclodictyon albicans (Hedw.) Broth. 



VENEZUELA: Bolivar: Chimanta Massif, riverine forest near Piedra Cucuy, alt. 100 m, 

 Maguire Sr Wurdack 34947. 



Callicostella depressa (Hedw.) Jaeg. 



VENEZUELA: Amazonas: On fallen logs along uppermost Rio Xatua, alt. 100-140 m, 23 

 Oct 1957, Maguire, Wurdack Sr Maguire 41940. 



Leskeodon parvifolius Bartr., sp. nov. 



Caulis 1-1.5 mm longus, dense foliosus, prostratus. Folia parva, sicca cris- 

 patula, humida late patentia, 1-1.2 mm longa, 0.6 mm lata, late ovata vel obovata, 

 piliformiter aristata, arista ad 0.3 mm longa ; marginibus parce vel haud un- 

 dulatis, integris, limbatis, limbo angusto, 3-seriatim ; costa tenui, ad medium 

 folii producta ; cellulis hexagonis, laxis, diam. 25-28 Caetera ignota. 



VENEZUELA: Bolivar: Chimanta Massif, between Summit Camp and base of escarpment 

 on damp log, alt. 1880-1970 m, 27 Feb 1955, Steyermark Sr Wurdack 1184a (type). 



This species may be compared with L. pungens Mitt, from which it differs 

 in the flat, scarcely undulate leaf margins and the much larger leaf cells. 



Actinodontium portoricense Crum & Steere. 



VENEZUELA: Bolivar: Chimanta Massif, forest along Rio Tirica, Torono-tepui, on log 

 in dry stream bed, alt. 1365-1670 m, Steyermark Sr Wurdack 1260a. 



These plants agree closely with those from the type collection of A. portori- 

 cense in the larger leaves and strongly recurved margins. The range extension 

 south to southern Venezuela follows the typical pattern of many of the West 

 Indian species recorded here. 



Hypnefla cymbifolia (Hpe.) Jaeg. 



VENEZUELA: Bolivar: Chimanta Massif, Clusia forest on slopes of Middle Falls of 

 Rio Tirica below Summit Camp, alt. 1760-1880 m, Steyermark 4' Wurdack 1218; slope forest 

 of Tirepon-tepm, alt. 1200-1250 m, Wurdack 34056, 34365. 



Neohypnella chrysophyllopodia (C. M.) Bartr. 



VENEZUELA: Bolivar: Chimanta Massif, trail between Camps 3 and 4, vicinity of 



stream between northwestern part of Abacapa-tepui and Apacara-tepui, alt. 1200-1600 m, 



Steyermark 75149. 



Hookeriopsis falcata (Hook..) Jaeg. 



VENEZUELA: Bolivar: Chimanta Massif, five collections showing a general distribution 

 at altitudes of 1600-2050 m, on logs. 



Hookeriopsis parkeriana (Hook.) Jaeg. 



VENEZUELA: Bolivar: Chimanta Massif, rich forest on lower northwestern slopes of 

 Abacapa-tepui, vicinity of Camp 1 along Rio Abacapa, alt. 420 m, Steyermark 74732 ; rich 

 forest, vicinity of base camp near Rio Tirica, lower southwestern slopes of Chimanta -tepui 

 (Torono-tepui), alt. 1000 m, Steyermark 75577. 



