230 IIAIIVEY ON A NEW GENIJS OV HYDROCH A lUDE^. 



XI. — Account of a Neiv Genus of the Natural Order of Hy- 

 DROCHAniDEiE, from Southern Africa, By ilie Honour- 

 able W. H. Harvey. 



iWith a Plate, Tab. XXII.] 

 Lagarosiphon, H. 

 Flares dioici. Masc. Spatha sessilis, ovata, compressa, 

 bifida, niultiflora"; floribus pedicellatis. Ferianthium 6-par- 

 titum, petaloideum, laciniis exterioribus majoribus. Stamitia 

 G, 3 antherifera perigonii laciniis exterioribus opposita, tria 

 ananthera, filiforniia, elongata, iisdem alterna : filamenta 

 brevia, filiformia; antherce \)roinx\<\e bifidoe, basi acuminatse, 

 demum deflexae, biloculares, loculis poliinis granulas nnagnas 

 subdecem, bifarias includentibus. 



Fern: spatha sessilis, oblonga, compressa, bifida, uniflora; 

 flore sessili. Perigonii tubus longissimus, filiformis, basi 

 cum ovario connatus; limbus sexpartitus, petaloideus, laci- 

 niis exterioribus majoribus. Stamina ananthera 6, filiformia, 

 brevia. Ovarium adnatum, uniloculare, placentis parietali- 

 bus tribus. Ovula 1 — 2 utraeque placentae ad basin inserta, 

 erecta, anatropa. Stylus cnm perigonii tubo connatus, sequi- 

 longusque ; stigmata tria, bipartita, segmentis lanceolatis, 

 mammillatis. Pericarpium membranaceum, di-trispermum. 

 Semina cylindrica, erecta, arillo parvo carnoso suffulta. 

 Embryo exalbuminosus, orthotropus, extremitate radiculari 

 infer a. 



Getius HydrillcB proximum. — Nomen y.ayapo;, tenuis^ et 

 ff/fwv, tubus. 



L. muscoides, Harv. MS.— Tab. XXII. 



Hab. Ilivulis innascens. " Albany," C.B.S. C. Zeyher. 



? Drege. 



Herba fluitans, ramosa, I — 2 pedalis, gracilis, pellucida. 

 Folia alterna, opposita, subverticillatave, lineari-altenuata, 

 uninervia, cartilagineo-marginata, serrulata. Spathce axil- 

 ares. Perigoniafeminarum natantia ; marium submersa ! 



The figure is made from a dr}' specimen, and I fear the 

 exact shape of the segments of the perianth may not be cor- 

 rectly given, as it is almost impossible in the case of such 

 delicately membranaceous, deliquescent and minute objects to 



