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ArchIlejeunea clypeata (Schwein.) Schiffn, {Ph7^ag)nzcoma clypcata 

 l>^ees){LeJettnea clypeata SnW.). Fig. i. 



Plant pale green, growing in broad mats ; stems irregularly branched : 

 leaves imbricated, dorsal lobe obliquely spreading, broadly oblong; apex 

 rounded: margin crenulate from projecting cells ; ventral lobe ovate-trian- 

 gular, inflated, apex blunt, junction of lobes forming an obtuse angle: un- 

 derleaves distant, orbicular, rounded at the apex, abruptly narrowed at 

 base, very short decurrent: inflorescence autoicous ordioicous: female in- 

 florescence borne on a principal branch ; bracts complicate, unequally bifid, 

 scarcely or not'at all winged on keel, lobe obovate, rounded at apex, crenu- 

 late, lobule oblong, rounded at apex; bracteole ovate-oblong, narrowed at 

 base, truncate or refuse at apex ; perianth obovoid, truncate with a short 

 broad beak, five keeled, keels roughened: male spikes on short branches, 

 oblong; antheridia in pairs. 



This species occurs on rocks and trees, and ranges from Connecticut to 

 Georgia and Louisiana. It has been distributed in Musci Alleg. 262, and in 

 Hep. Bor. Amer. 95, as PJu^agmicoma clypeata. Also in Hep. Am, 50, as 

 Lejeu7iea clypeata. 



Archilejeunea Sellowiana Steph. {Phragvu'coina xanthocarpa Aust.) 

 {Lejeunea velata Gottsche.) Fig. 2. 



Plants pale green or glaucous, in wide mats: stems closely appressed to 

 matrix : leaves closely imbricated, the dorsal lobe widely spreading at 

 nearly right angles with the stem, ovate-oblong, apex rounded, margin entire 

 or nearly so, lower margin arching across stem : lobule inflated toward base, 

 oblong, apex acuminate, sometimes curved, ending in a tooth three to eight 

 cells long, two to four cells wide at base and with a single row of cells at apex ; 

 lobules on small branches often poorly developed : underleaves broadly 

 orbicular to reniform, rounded, truncate or refuse at apex, rounded at base: 

 inflorescence autoicous; female on short branch usually, bracts complicate, 

 unequally bifid; perianth obovoid, half exserted, broad and truncate above, 

 with short, narrow beak, five-keeled, keels roughened: male spikes similar to 

 A. clypeata. Found on trees and rocks. Range from Rhode Island to 

 Tennessee, south to Florida and Texas. Distributed in Hep. Bor. Am. 95b. 

 as Phragmicoma xaiithocarpa. 



Harpalejeunea ovata (Hook.) Schiffn. \Lcj eunea ovata Tayl.) {Lejeunea 

 Molleri Steph.) 



Plants pale to dark green, losely caespitose or scattered : stems pros- 

 trate, closely appressed : leaves contiguous or somewhat imbricated, lobe 

 spreading, gradually narrowed beyond middle, apex of ten reflexed, usually 

 acute, margin nearly entire: lobule (ventral lobe) strongly inflated, ovoid, 

 keel strongly arched, crenulate from convex cells: apex with a single pro- 

 jecting cell: underleaves distant, broadly cuneiform, apex broad, truncate 

 or emarginate with a shallow sinus, rounded or obtuse segments, margin 

 entire: inflorescence dioicous; female on a leading branch : bracts as before; 

 perianth obovate- clavate, acutely five-keeled in upper part: male spike on 

 short branch. 



