— 146 — 



Species cum L. lati folio Broth, comparanda, sed foliis margine late revolutis, 

 apice angustioribus, cellulis duplo minoribus facillime dignoscenda. L. Gatn- 

 baragarae Negri, mihi e descriptione tantum cognita, foliis in parte superiore 

 basis quasi in auriculas dilatata jam differt. 



Leptodontium Joannis Meyeri C. Miill. var. cameruniae Broth, n. var. — FoUa 

 parce serrata, nervo dorso laevi. 



Gr. Kamerun-Berg: Lavastrome unter der Herzogin Elisabeth-Hiitte 

 am Fako-Gipfel, ca. 3800 m ii. M. (steril im Juni 1908 — n. 3387). 



Leptodontium sublaevifolium Broth, n. spec. — Dioicum; robustiusculum, 

 caespitosum, caespitibus densiusculis, mollibus, late extensis, lutescenti-viridibus; 

 caulis usque ad 10 cm longus, adscendens, plus minusve radiculosus, densiuscule 

 foliosus, simplex vel furcatus; folia sicca flexuoso-patentia, humida e basi erecta 

 squarrosa, decurrentia, carinato-concava, e basi oblonga elongate lanceolata, 

 marginibus in parte basilari vel paulum ultra revolutis, superne grosse et inaequa- 

 liter serratis, nervo breviter excedente, dorso laevi, cellulis laminalibus minutis, 

 incrassatis, lumine irregulariter angulato, sublaevibus, basilaribus elongatis, 

 valde incrassatis, parietibus sinuosis, inter se porosis, minutissime seriatim 

 papulosis, infimis tnulto laxioribus, hand incrassatis, laevibus, fuscoaureis. 

 Caetera ignota. (Taf. XII, Fig. 14.) 



Vulkan - Gebiet: Karisimbi, Siidkraterrand unter Phillippia, ca. 3400 m 

 ii. M. (steril im Sept. 1907 — n. 2070). 



Species distinctissima, rete foliari raptim dignoscenda. 



Leptodontium persquarrosum Broth, n. spec. — Species praecedenti valde 

 af finis, sed statura multo graciliore, foliis persquarrosis cellulisque minus incras- 

 satis certe diversa. (Taf. XII, Fig. 15.) 



Vulkan - Gebiet: Karisimbi, Gipfelkegel, ca. 4000 m ii, M. (steril im Sept. 

 1907 — n. 2090). 



Vorliegende Art zeigt in der Tracht eine auffallende Ahnlichkeit mit Dicra- 

 nella squarrosa. 



Leptodontiopsis fragilifolia Broth, n. gen. et spec. — Dioica; robusta, caespitosa, 

 caespitibus densis, late extensis, mollibus, pallide viridibus, aetate fuscescentibus, 

 opacis; caulis usque ad 5 cm altus, adscendens, dense fusco-tomentosus, dense 

 foliosus, superne fasciculatim ramosus; folia sicca flexuoso-adpressa, humida 

 squarrosa, longe decurrentia, carinato-concava, e basi elliptico-oblonga sensim 

 anguste lanceolato-subulata, hyalino-mucronata, subula plerumque diffracta, 

 marginibus erectis, integerrimis, nervo tenui, pellucido, dorso laevi, cellulis in- 

 crassatis, lumine minuto, subrotundo, minute papillosis, pellucidis, basilaribus 

 elongate et anguste linearibus, valde incrassatis, laevissimis; bracteae perichaetii 

 erectae foliis subsimiles, majores, intimae cellulis elongatis altius productis; seta 

 c. 1,5 cm alta, terminalis vel pseudolateralis, tenuis, flexuosula, sicca superne 

 dextrorsum torta, lutea; theca erecta, oblonga, brevicollis, ecostata, sicca laevis, 

 pachydermis, fuscolutea, aetate sordide fusca, deoperculata microstoma, rarius 



