On Bog Mosses. 15 



Branches crowded, usually 5 hut sometimes 3 iyi a fascicle, 1-2 

 patulous, arcuato-decurved, the rest slender, greatly elongated, 

 appressed to stem ; the retort cells perforated at the scarcely pro- 

 jecting apex. Cauline leaves broadly ohovate-lingulate, minutely 

 auricled, the apex truncate and slightly fringed; areolae from 

 middle to apex rhomboid, at middle base flexuose- rhomboid, thence 

 to margins very narrow, flexuoso-linear, quite free from pores and 

 fibres, or with a few weak fibres in the upper part. Bamuline leaves 

 densely croivded, indistinctly 5-ranked, when moist turgidly imbri- 

 cate, when dry erecto- patent, opaque, concave, ividely ovate acumi- 

 nate, the apex broadly trunaiie, iviih 6-10 unequal obtuse teeth, 

 the margin incurved in the upper two-thirds, and with a faint 

 border of two rows of extremely narrow cells; the hyaline cells 

 annul ate- fibrose, confluent above and btlotv, minutely and sparingly 

 porose, chlorophyll cells central, much compressed ; the leaves of the 

 pendent branches with the point rounded and indistinctly toothed. 



Fruit in the coma, on a thickish white peduncle ; the perichas- 

 tium inflated oblong, whitish, lower bracts ovcde acuminate muti- 

 cous, middle broadly ovate-oblong, innermost broadly oblqug, deeply 

 concave, and sometimes cucullate at apex, cdl with very narroio 

 linear areolation, quite free from fibres or pores. Spores ferru- 

 ginous. 



Male plants growing in the same tufts with the female, more 

 slender ; the amentula short, ovate closely imbricated, pale green, 

 crowded in the coma ; bracts roundish-ovate, in the lower part of 

 lax wide curved non-porose cells, often free from fibres, becoming 

 denser, porose and fibrose toward the broadly truncate toothed apex. 



Hab., deep marshes in numerous places throughout ' Lapland, 

 forming great tufts in the water, resembling islands (Lindberg, 



o 



Angstrdm). Also in Finland and at Drivstuen in the Dovrefjeld 

 mountains of Norway. Fr. July. 



This fine Sphagnum resembles in habit the slender forms of 

 S. cymbifolium, and may thus have been frequently overlooked ; 

 apart from the non-fibrose cortical cells, the form of the point of 

 the branch leaves will serve to distinguish them at a glance. 



According to Lindberg this species was first detected in 1825 

 at Karesuando in Tornean Lapland by Lsestadius, and distributed 

 along with 8. fimbriaium and subsecundum under the name of 

 S. latifolium var. cordifolium. 



o 



The specimens figured were collected by Angstrom at Lycksele 

 in Umean Lapland, and I am indebted to the kindness of Prof. 

 Lindberg for others which are much more compact, and with 

 straight stems. 



VOL. X. 



