8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



julaceo-appressa, c basi rotundato-ovata breviter saepe oblique acute 

 acuminata, marginibus planis vel uno latere ad basin angustissime 

 reflexis, integris, costa inferne sat valida, supeme scnsim angustata, 

 infra apicem evanida. Cellulae superiores subrotinidatae seu 

 brevissime ellipticae, parietibus subincrassatis, juxta-costales paullo 

 elongatae, omnes fere basilares transverse ellipticae ; omnes omnino 

 laeves, valdc pellucidae. Flores masculi numerosi, subfuscentes ; 

 perichaetia breviuscula, foliis internis suberectis, sat breviter 

 acuminatis, superne subdenticulatis. Fructus ignotus. 



Hab. : On trees, Chiko Forest, Busoga, alt. 3,500 ft., 1916, 

 Snowden yc. Type in my herbarium. 



The generic position of this plant can not be considered definitely 

 settled in the absence of fruit, but its close affinity to one or two 

 other African species of Lindbergia, notably L. haplocladioides 

 Dixon 1 and L. viridis Dixon & Wager (ined.), leaves no doubt in 

 my mind of its belonging here. L. haplocladioides closely resembles 

 it, but the leaves there are more longly acuminate, less widely spread- 

 ing when moist, and not julaceously appressed when dry ; the stems 

 more slender and more curved. L. viridis has leaves less spreading 

 and more gradually acuminate, longer and thinner-walled cells, 

 stouter nerve, etc., and is a far more slender plant. 



THUIDIUM LAEVIPES Mitt. 



Chiko Forest, Busoga, 1916, Snowden 2b; c. fr. Tree trunk in 

 forest, Kipayo, 4,000 ft., Dec, 1915, Diimmcr 512, 720; c. fr. 



Original specimens of Mitten's species appear to be unavailable ; 

 but these agree well with central African specimens so named, which 

 agree with Mitten's description ; it appears to be not infrequent in 

 central Africa. The cilia on the inner perichaetial bracts are some- 

 times extremely long and conspicuous, but this character is not 

 constant. The capsules are usually much contracted below the 

 mouth. 



THUIDIUM PALLIDISETUM Dixon, sp. nov. 



T. pycnangiello C. M. affine, sed habitu multo alieno, laetevirens, 

 ramulis densius confertis, foliisque confertioribus; cellulis foliorum 

 ramulorum multo minoribus, chlorophyllosis, magis obscuris. 



Caules elongati, regularitcr plumose bipiunati; rami subaequales, 

 circa 5 mm. longi, ramulis confertis, numerosis. Folia caulina 

 penninuta, triangularia, breviter acuminata, falcato-squarrosa, levi- 



1 Bull. Torr. Bot. Club 43: 75. 



