424  STEGOCARPI. PLEUROCARPL  uvpyuw. 
ato-scabra, nervo ultra medium evanido canaliculato, 
cellulis angustis curvatis in membranam scariosam veluti 
conflatis pallidis, alaribus permultis planis rhomboideo- 
quadratis incrassatis ; perich. appressa stricta pallidiora, 
late lanceolato - acuminata longitudinaliter plicata, basi 
infima laxius reticulata; theca in ped. elongato purpureo 
inclinata , arcuato -cylindracea, late annulata, opere. cô- 
mico suboblique rostellato; perist. d. ext. lati longi lutei 
valde cristati, int; in membrana alta. flavida densissime 
reticulata angusti hiantes, ciliis 1 — 2 brevibus. 
H. Stereodon rugosus Brid. ll. p. 633. — H. rugulosum Web. 
et Mohr. Bot. Taschb. p. 363. —  H. lutescens crispum, Lycopodii 
facie. Dill. Musc. p. 289. t. 37. f. 24. A. B. 
Patria. In collibus apricis argillaceo=calcareis per 
totam Europam passim et in America septentrionali. — 
Vere. Rarissime fructificans. 
Notis laudatis ab H. scorpioide et lycopodioide di- 
stinctissimum. Flores masculi et feminei fugacissimi. 
361. H. palustre L. (Sp. PI. p. 1593.) ; monoicum; 
cespites lati prostrati virides; caulis repens, ramis fasci- 
culatim divisis subtenuibus distincte homomallophyllis apice 
uncinatis, humore mollibus; folia caulina valde secunda 
ke- ^ oblongo - ovato - lanceolata subcomplicate concava, 
pa falcata, margine erecto v. paulisper involutaceo 
integerrimo, nervo valido ante apicem evanido saepe ge- 
mino viridi, cellulis brevibus viridibus minutis, alaribus 
paucis minutis viridibus, dein badiis plus minus impres- 
Sis; perieh. appressa stricta tenuiora late longe lanceo- 
lato-acuminata pallida; theca in ped. brevi crasso rufo 
laevi subflexo inclinata cylindraceo - oblonga cernua ex- 
annulata fusca, operc. conico; perist. d. ext. longi lati 
lutei, latere intus distincte cristati, int. in membrana bre- 
viuscula flavida subangusti hiantes, ciliis 1—2 albidis 
nodosiuseulis. 
H. Stereodon palustris Brid. IL. p. 639. —  H. luridum Sw. 
Musc. Suec, p. 58 et Hdw, Musc. Fr. IV. p. 99. t. 38. — H. adna- 
tum "Turn. Muse, Hib. p. 165. — H. heterophyllum Neck. Meth. 
Musc. p. 168. — H, heterophyllum aquaticum polycephalum, repens, 
