10 MÉMOIRES DE l'herbikr BoissiER. Pallavicinius . 



4. Pallavicinius piliferus St. Hedw. 1891, p. 271. 



Dioica, mediocris, flaccidissima, dense depresso ceespitans, dilute oli- 

 vacea. Frons procumbens ad 2 cm. longa, 5 mm. lala, undulata, late 

 ligulala, basi breviter stipitata, ex apice angustato continuala vel e latere 

 costee innovata. Costa angusta, plano-biconvexa, tenuis, medio 8 cellulas 

 crassa, sensim in alas excurrens. Alae tenerrimae margine piliferee, pilis 

 4-5 cellulas longis, hamatulis; cellulse alarum 4S X 72 p. parietibus 

 tenerrimis. Involucra parva, conico-cupulata, humilia (in statu sterilij 

 margine longe fimbriata, laciniis flliformibus ramosis, lanatim intricatis. 



Hab. Africa trop, occid. Insula S. Thomé (Quintas). 



5. Pallavicinius spinosus (G.) St. 



Syn. : BkjUia spinosa G. Linnsea XXYIII, p. 560. 



Mittenia spinosa G. Ann. sc. nat. 1864, p. 84. 



Dioica, minor, tenuis. fusco-virens vel brunneola, dense depresso 

 csespitans. Frons procumbens, ad 15 mm. longa, simplex vel furcata vel 

 e latere costœ ramosa, ramis anguste linearibus, millimetrum latis, planis. 

 Costa angustissima, alte biconvexa, postice magis producta, abrupte in 

 alas desinens. Aise tenues margine grosse spinosse, spinis approximatis, 

 hamatimincurvis, basi 4 cellulas latis, acuminatis setaceis. Ce/k/a? alarum 

 ad costam 36/72. medio 36/54, margine 12/45 p., parietibus validis. 

 Involucra crassa, ad medium multifida, laciniis acutis vel emarginato- 

 bifîdis, exlus squamulis accessoriis lanceolatis obsitis, margine cellulis 

 longis digitiformibus crenato. Perianthia magna, 5 mm. longa, fusco 

 brunnea, superne plicata, ore plus minus profunde fîsso, laciniis margine 

 apiceque ciliatis. Calyptra valida, brunnea, basi crassa ibidemque perian- 

 thio breviter coalita. Capsula in pedicello 9 mm, longo parva, cylindrica, 

 apice rotundata. Sporœ 18 ]x, rufescentes, asperae. Elateres brèves, ad 

 216 [1 longi, parum attenuati, spiris 3, laxe tortis. Andrœcia in ramulis 

 posticis longe spilitatis, breviter disciformibus maximeque spinosis; 

 bractese aggregatse (5-6) cucullatae, margine 3-4 spinosse, monandrae. 



Hab. Australia, Gippsland. (Ferd. von Müller). 



6. Pallavicinius xiphoides (Taylor) St. 



Syn. : Diplolœna xiphoides Tayl. J. of Bot. 1844, p. 569. 



Blyttia xiphoides Syn. Hep., p. 476. 

 Dioica, valida, gracillima, longe procumbens denseque stratificata, 

 olivacea. Frons ad 7 cm. longa, repelito-furcata, furcis ssepe irregularibus, 

 brevibus pinnseformibus, aliis longissimis simplicibus; rami postici 



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