428 Equisetaceae, Hydropterides. 



6. Equisetum hyemale lAm. Spec. 1517. Flor. Dan. 

 t.\i09. Engl Bot. f. 915. SchIc.Crypf.t.ll2.a. 

 Caulibus simplicihus, raro subramosis, erectis, sca- 

 bris, subg^laucescentibus, apice l-stachyis; vaginis cauli- 

 nis arctis, multidcntatis; dcntibus subulato - aristatis, 

 cadncis. 



In collihus siccis, ad paludum marg;ines in- 

 qne pratis sylTaticis. (Kreutzberg', Aufstall, 

 Jungfernheide, Papenberge, Rudow.) Fructifi- 

 cat Majo, Junio. 2J. 



HYDROPTEPtlDES J-Filld. 

 Marsileaceae Brown. Salvinieae Juss. Rhizocar- 

 peae Bafsch., Bischoff. 

 Sporocarpia inter fibras radicales, in axillis pe- 

 tiolorum vel in ipsis petiolis supra basim inserta, 

 1 - plurilocularia , interilum incomplete dehiscentia. 

 Organa propagationis (sporangiaJ) duplicis indolis, 

 nunc in eodem, nunc in diversis sporocarpiis (invo- 

 lucris^); alia sub integumento siraplici (vel? duplici) 

 sporam includentia, alia granula referentia nuda vel 

 per plura in sacculis membranaceis conlenta. Uer- 

 bae palustres vel aquaticae, repentes vel natantes, 

 raro acaules caudiccque tuberoso praeditae. Fo- 

 lia sessilia vel petiolata^ integra, interdum quater- 

 nata vel ad petiolum redacta. Vernatio plerumque 

 circinaia. 



Conspectus g^ene.rnm. 



1. Organa propagationis duplicis indolis in eodem spo- 



rocarpio 4-loculari coriaceo ----- Pilularia. 



2. Organa propagationis duplicis indolis in diversis spo- 



rocarpiis 1-locularibus membranaceis- Salvinia. 



