NATURAL SCIENCES OF PHILADELPHIA. 227 



On the bark of Negundo aceroides, " Tomales Bay," California, Bolander, 

 (1864). 



The flagellae are nearly erect, about as high as the fertile branches, and 

 clothed on the underside with crowded, squarrose amphigastria, but are with- 

 out leaves except at the apex, where these are crowded into little tufts or heads, 

 and are not mixed with amphigastria. 



A small species ; scarcely as large as F. Eboracensis (which has somewhat 

 similar flagellae), and differing from it chiefly in the 2 — 4 nerves on the back 

 of the perianth, in the involucral leaves connate with the amphigastria, and 

 in the compressed (much as in F. squarrosa) auricle of the leaf. 



Frullania Leana, Aust. 



F. pusilla, rufo-brunnea ; caule brevi ; foliis rotundato-ovatis obtusis 



omnino crassiusculo apiculatis, auriculis fere raaximis subcj'lindricis obliquis a 

 caule valde distantibus oblongo-areolatis basi dependente distincte crenulato- 

 dentatis ; amphigastriis majusculis oblongis bifidis integerrimis planis rectis 

 caulis latitudinem parce excedentibus ; perianthio e basi subattenuata obovato- 

 oblongo multum exserto laevi dorso piano ventre unicarinato apice subtruncato, 

 rete ad basin maximo oblongo supra medium minuto heteromorpho maxime 

 stelliformi ; involucri foliis cum amphigastriis (semper?) connatis margine 

 sinuato-dentatis, lobulis plus minus iucisis erectis paralellis, amphigastriis 

 valde majoribus parce inciso-dentatis. 



On trees near Cincinnati, Ohio, T. G. Lea (in Herb. Tayl. mixed with Lejeunin 

 longiflora). 



Remarkable for the very large, oblong, distant auricle, obtusely dentate at 

 the base, and for the thickish, apiculate leaves. 



A very small species, about the size of F. Duimmondii, Tayl.; from which, 

 however, it is readily distinguished by its more imbricated, apiculate leaves, 

 by the much larger auricle very distant from the stem, and with a very dis- 

 tinct tooth-like lobe on the margin of the leaf close to its base. The perianth 

 is also differently areolated, and the perichsetal leaves are toothed on the lower 

 lobe, oreven incised. 



Frullania Mauritiana, Aust. 



F. tetragyna (semper?) ; caule bi — tripinnato flexuoso ; foliis siccatis caulem 

 subcircumvolutis madefactis patentibus e basi valde angustata oblique (subfal- 

 cato-) ovatis, apice deflcxo-incurvis longiuscule acuminatis apiculatisve, rete 

 e cellulis (marginalibus subrotundis exceptis) angustis linearibus oblongisve 

 plus minus sinuosis in centro subhyalinis, intersticiis latissimis (quam cellulis 

 parce latioribus) obscuris confluentibus instructo ; auricula oblongo-cylindrica 

 mediocri oblique a caule distanti ; amphigastriis e basi angusta late obova- 

 tis planiusculis vel margine versus basin subrecurvis ad J — i bifidis, sinu au- 

 gustoobtuso, lobis acutis ; perianthio oblongo, dorso lasvi, ventre unicarinato, 

 apice loDge rostrato ; foliis amphigastriisque involucralibus erectis adpressis, 

 lobis ovatolauceolatis inciso-serratis. 



Island of Mauritius. Communicated by Prof. Chas. H. Peck. 



Readily recognized by the very narrow base, acuminate apex, and narrow 

 subsinuous cells of the subfalcate leaf; by the largish, subcylindrical, oblique 

 auricle distant from the stem ; by the nearly plane and strongly incised lobes 

 of the involucral leaves and amphigastria. The lower margin of .the leaf, be- 

 tween the auricle and the stem, is narrowly but distinctly inflexed ; it is also 

 furnished with a minute, cilia-like tooth, which is close to the auricle and 

 composed of about six roundish cellules arranged in a single row. 



Frullania orbicularis, Aust. 



F. monogyna; caule lato extenso bi — tripinnatim decomposite circa 3 

 unciali, ramulis plus minus divaricato-recurvis ; foliis laxe imbricatis majus- 

 culis oblique ovatis vel ovali-auriculseformibus convexis subpellucidig, apice 



1869.] 



