6 Necker A. 



Sect. 1. Florescentia monoica. 



j4. Capsula periehaetio immer sa. 



a. Peristomium internum incompletum *. 



1. NECKERA PENN ATA Hedw. monoica, foliis ovato-lanceolatis acuminatis , apice obsolete serru- 

 latis, undulatis, pallide viridibus , costa omnino nulla vel vix conspicua bifurca\ perichaetialibus 

 inlernis elongato-lanceolalis , lanceolato-acuminatis, cosia lenuissima vel nulla; calyptra minuta, vix 

 infra operculum producta; capsula ovali, peristomü denlibus lanceolato-subulatis , hie illic pertusis, 

 apice conglutinatis ; interni processibus brevissimis, fugacibus. 

 Neckcra pennata Hedw. Muse, frond. III, p. 47, Tab. xix. — Schwägr. Suppl. I, P. 2, p. 144. — 

 Web. et Mohr B. T. p. 239. — Hook et Tayl. Muse. Brif. ed 2, p. 135 Tb. Suppl. IV. — 

 Hartman Skandin. Flor. ed. .5, p. 338. 

 Nechera Dislichia pennata Brid. Bryol. univ. II, p. 238. 

 Cryptopodia pennata Röhl. Deutschi. Flor. III, p. 82. 

 Fontinalis pennata Linn. Spec. Plant, p. 1371. 

 Sphagnum pennatum undulatum vagina squamosa Dillen, Eist. Muse. p. 250, Tab. xxxii, fig'. 9. 



Habit. Ad aiborum tnincos in sylvis umbrosis per totam Europain et Américain septentrionalein. 



Matur. Martio et Aprili. 



Tab. I. Caespites laxi, laete vel e liiteo virides. 



Rami Primarii incumbentes vel arcuato-ascendentes, 1 — 3-poliicares, nunc conferte et regulariter, 

 nunc vemote et iuterrupte pinnato - ramulosi ; ramuli abbreviati obtusi vel longiores et flagelli- 

 formes (fig. 1). 



Folia coiiferta, antica et postica oblique Incumbentia, subplana et subsymmetrica (fig. 4), lateralia 

 e basi uno latere valde inflexa verticaliter hoiizontem versus veigentia (3, h, C), deplanato-concava 

 (x, xQ, oinnia ovato-lanceolata, subito vel sensim acuininata, apice interdum ad medium usque minute 

 Jjt denticulata, band raro integenima (ßa.'), mediocriter uuduiata, ecostata vel costa brevissima bifida 



Co); areolatio densa (fla, 6b). Folia stoloiium vel flagellorum caeteris multo minora, undique patentia, 

 ovato-lanceoiata (7, 8). 



Flores monoici, in ramis primariis axillares (1 b, 9). Folia peiigonialia Fig. 10, 11; antheridia 

 et paraphyses Fig. 12. 



Fruclus in ramorum facie inferiore numerosi, seriati et conferti vel remoti {\, 1 b). Folia peii- 

 chaetialia externa niiniinaj ovato-obtusa (13), dehinc sensim majora, late ovata, brevi-acuminata (14), 

 ovato-lanceolata (15) >, intima tandem elongato-lanceolata, in apiculum lanceolatum excurrentia (16) 

 valde concava, costa obsoleta tennissima instructa (16 x). Vaginula ramulo perichaetiali brevi vix 

 longior, parapliysibus numerosis pilosa (18). Calyptra. vix in capsulam procedens (17, 20). Oper- 

 culum brevirostrum (20). Capsula ovalis, periehaetio iminersa, e luteo fusca, mollis. Peristomü 

 externi deutes e basi lanceolata lineali-subulati, apice omnes iiiter se cobaerentes, reguläres vel 

 vario modo pertusi et fissi (22,23), dense articulati, hyaliui vel pallide flavescentes, humidi in conum 

 conferti, sicci incurvi apicibus conglutinatis erectis (21). Peristomium internum imperfectum; pro- 

 cessus e membrana hyalina angustissima brevissimi, irreguläres, fugaces (22, 24). Sporae magnitudine 

 mediocri, ferrugineae (25). 



Sect. b coutiiiet species exoticas peristomio iuieriio long;e ciliato. 



