1960] 



BOTANY OF THE GUAYAXA HIGHLAND PART IV 



9 



Hookeriopsis crispa (C. M.) Jaeg. 



VENEZUELA: Bolivar: Chimanta Massif, northwest-facing slopes between Summit Camp 

 and base of escarpment, alt. 1880-1970 m, SteyermarJc 4' Wurdack 1184; talus forest between 

 Camp 5 and base of lower escarpment, alt. 1750-2000 m, Wurdack .34101. 



Hookeriopsis (Omaliadelphus) maguirei Bartr. sp. nov. 



Dioica, sat robusta, lutescenti-viridis, nitida. Caulis ad 8 cm longus, irregu- 

 lariter ramosus, dense foliosus. Folia sicca laxe imbricata, leniter contorta, haud 

 undulata, humida ereeto-patentia, oblongo-ovata, valde concava, rotundato- 

 obtusa, ad 1.5 mm longa, 0.6 mm lata; marginibus erectis, integris, prope apicem 

 inflexis ; costa bina. fere ad apicem producta, dorso superne laevissima ; cellulis 

 linearibus, apicem versus brevioribus, ovalibus, inferne laxioribus, laevissimis. 

 Seta 3-3.5 cm longa, sat tenuis, rubra, laevissima; theca horizontali, e collo 

 brevi ovali, deoperculata 1—1.2 mm longa. sub ore valde constricta. 



VENEZUELA: Amazonas: Cerro de la Neblina, locally frequent on logs and tree trunks 

 in talus forest between Camps 3 and 4, alt. 700-1100 m, December 28, 1957, Maguire, Wur- 

 dack 4- Maguire 42543a (type). 



Sharply distinct in the concave, obtusely rounded, smooth leaves. 

 Lepidopilum diaphanum (Hedw.) Mitt. 



VENEZUELA: Amazonas: Cerro de la Neblina, Rio Yatua, on logs and tree trunks in 

 talus forest between Camps 3 and 4. alt. 700-1100 m, 28 Dec 1957, Maguire, Wurdack # 

 Maguire 42543b; mixed with Thudium uroeolatwm Lor. 



Only a scrap but an interesting record as the species was previously known 

 only from Jamaica and Guatemala. 



LEUCOMIACEAE 



Leucomium attenuatum Mitt. 



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, 

 SteyermarJc 75147 ; densely forested slopes between upper reaches of Rio Tirica and Riscobel 

 Ledema Camp, southeast portion of Apacara-tepui, alt. 1700-1850 m, Steyermark 75964a. 



LESKEACEAE 



Thuidium urceolatum Lor. 



VENEZUELA: Amazonas: Cerro de la Neblina, on logs and tree trunks in talus forest 

 between Camps 3 and 4, alt. 700-1100 m, Maguire, Wurdack 4' Maguire 42543, 28 Dec 1957. 

 Bolivar: Chimanta Massif, on forested slopes between Camps 3 and 4, southwestern part of 

 Apacara-tepui, alt. 1210-1600 m, Steyermark 75046 ; between Bluff Camp and low promontory 

 north of Bluff Camp, along west-facing portion of Chimanta-tepui (Torono-tepui), Steyer- 

 marlc 75655. 



SEMATOPH YLLAOEAE 



Sematophyllum caespitosum (Hedw.) Mitt. 



VENEZUELA : Bolivar: Chimanta Massif, slope forest along Rio Tirica, Steyermark 4' 

 Wurdack 1260, alt. 1365-1670 m. 



Potamium vulpinum (Mont.) Mitt. 



VENEZUELA: Bolivar: Hato la Vergarena, along Rio Aro, 14 km below mouth of Cano 

 Azul, alt. 390 m, Wurdack # A r . G. L. Guppy 230. 



Acroporium pungens (Hedw.) Broth. 



VENEZUELA: Bolivar: Chimanta Massif, scrub forest near Summit Camp, alt. 1925 m. 

 Steyermark 4' Wurdack 319; vicinity of Upper Falls of Rio Tirica above Summit Camp, alt. 

 1940-1950 m, Steyermark 4~ Wurdack 609. 



