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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



alobiellaceae Fulford, fam. nov. 



Caules foliosi e caudice sine foliis, complanati, ramis ventrali-intercalaribus; cel- 

 lulae dorsales corticales maiores quam ceterae plerumque longiores quam latae. 

 Rhizoidea e parte ventrali caulis. Folia oblique inserta, succuba, breviter bifida. 

 Amphigastria magna, bifida. Inflorescentia masculina terminalis vel intercalaris. In- 

 florescentia feminea in ramo brevi ad caulem foliosum. Perianthium 3-carinatum, 

 carina tertia ventrali. 



Leafy stems complanate from a leafless caudex or from flagelliform branches. 

 Branching ventral-intercalary from the leafy stem or intercalary from the leafless 

 axis. Stem flattened dorsally, convex below, the dorsal cortical rows of cells much 

 larger than the rest. Rhizoids colorless, from the ventral side of the stem or all 

 parts of the leafless axes. Leaves oblique, succubous, plane, very shortly bifid. 

 Underleaves large, bifid to one-half. Male inflorescence terminal becoming inter- 

 calary on the leafy branch, both bracts and bracteoles present. Female inflorescence 

 on a short leafy branch from the leafy stem, the bracts and bracteoles similar to the 

 leaves and underleaves, more deeply bifid. Perianth 3-keeled above, the third keel 

 ventral. 



Type genus: Alobiella (Spruce) Schiffner, 1895. 



Alobiella (Spruce) Schiffner in Engler & Prantl, Nat. Pflanzenf. I 3 : 98. 



1895 [Jan.] 



Cephalozia Subg. IV Alobiella Spruce, On Cephalozia 28. 1882. 



Leafy stems from a leafless caudex, complanate, light green, irregularly branched; 

 branches ventral-intercalary, leafy, more rarely flagelliform, often caudex-like and 

 bearing several leafy stems; stems flattened dorsally, with two rows of very large 

 cells between the rows of leaves, the ventral side convex, with many small cortical 

 cells; in transverse section the cortical layer of 4 or 5 very large cells (dorsal) and 

 many small cells (ventral) surrounding a medulla of many small cells. Rhizoids 

 long, slender, colorless, scattered along the ventral side of the stem. Line of leaf 

 insertion nearly longitudinal, the leaves succubous. Leaves plane, widely spreading, 

 ovate, the tip bidentate, bidenticulate or rarely acute, the margin plane with or 

 without a border of narrow, elongate cells; leaf cells mostly rectangular, the walls 

 uniformly thickened, without trigones, the cuticle essentially smooth. Underleaves 

 large, rectangular in outline, bifid to one-half their length, the segments narrowly 

 triangular, equal or one shorter than the other, parallel or spreading. Plants dioicous. 

 Male inflorescence terminal becoming intercalary on the stem or a leafy branch, 

 the bracts leaf-like, pouched near the transverse insertion, bracteoles like the under- 

 leaves. Female inflorescence on a short ventral-intercalary leafy branch, the bracts 

 and bracteoles in several series, bifid. Perianth long, cylindrical below, 3-keeled 

 above, the mouth lobed, setulose. Shoot-sporophyte relationship a shoot-calyptra. 

 Capsule wall of 2 layers of cells with characteristic markings. Regeneration from 

 filaments grown out from leaf-cells. 



Type species: Jungermannia husnoti Gottsche, 1874. 



Key to the Species 



Leaves bidentate, bidenticulate or acute, bordered by one or more rows of long, 



narrow cells; underleaf segments of equal length. 1. A. husnoti. 



Leaves bidenticulate or acute, not bordered; one segment of the underleaf shorter 



than the other. 2. A. campanensi? 



