Uypnum. MUSCI. 4 1 < ) 



areolation, serrulate especially below and remotely denticulate above, the capsule 

 without annulus. It differs from //. Jluitans in its firmer narrower less crowded 

 more falcate and more narrowly areolate leaves, more distinctly auricled at base, and 

 the larger peristome with a broader basal membrane. — Bryol. Eur. t. G02. 



Var. cochleae, Austin. Stem strict, rigid : leaves erect, variegated witli ]iurpl(', 

 usually entire above and spirally twisted when dry, distinctly serrate; at the slii^hlly 

 narrowed base. — Coult. Bot. Gazette, ii. 143. JJichelyma fSwarlzii, Les({. in Mem. 

 Calif. Acad. i. 28 ; SuUiv. & Lesq. \. c. 2 ed. n. 344. 



Tn iiplaml swamps, Tulare County {Brewer) ; in pools on Mount Dana and swamps noar Men- 

 docino City, Bolandcr. A European species, forms of which are also lound in the Atlantic States. 



37. H. commutatum, Hedw. Stem procumbent or suberect, piunately 

 branched, 4 to 12 inclies long or more, brownish tomentose ; branches slender, ^ 

 inch long : leaves falcate-secund, twisted when dry, ovate-lanceolate from a broad 

 base, narrowly acuminate, sulcate, the upper auricle Hat and erose-denticulate, the 

 lower decurrent and entire, the stout costa reaching to the apex, areolation long- 

 linear, subtlexuous, hexagonal-quadrate at the angles : capsule oblong-cylindrical, 

 cornuous and arcuate; annulus broad; operculum acute: ciliolae 3, long. — Muse. 

 Frond, iv. 68, t. 20 ; Bruch & Schimp. 1. c, t. 607 ; Berkeley, 1. c, t. 10, fig. 5. 



On the east side of Mono Pass {Bolandcr) ; Europe. 



H. FiLiciNUM, Linn. More slender than the last and less regularly pinnate, the much smaller 

 firmer and more stoutly costate leaves not twisted when dry and the areolation much shorter : 

 tomentum more dense: annulus simple. — Hedw. Spec. t. 76; Engl. Bot. t. 1.570 ; nnicli & 

 Schimp. 1. c, t. 609. Washington Territory {LyaJl) ; llocky Mountains from British America 

 to Utah and Colorado ; Atlantic States and Europe. 



•t- -J- Monoecious. 



38. H. uncinatum, Hedw. Stem erect or prostrate, remotely pinnate-branched, 

 slender, about 2 inches long ; branchlets falcate : leaves crowded, yellowish green 

 and glossy, strongly falcate-secund, very long and narrow and subsetaceous from a 

 broad base, distinctly plicate-striate, serrulate, costate to near the apex ; areolation 

 very narrow, looser at base and more broadly rectangular at the angles ; perichtetial 

 leaves very long and hair-pointed, erect, striate : capsule oblong-cylindric, cernuous, 

 incurved : ciliolae 2, nearly equalling the processes. — Muse. Frond, iv. 05, t. 25 ; 

 Bruch & Schimp. 1. c, t. 600; Berkeley, 1. c, t. 11, fig. 1. 



Frequent in the Sierra Nevada, and throughout North America from arctic regions to Utah, 

 Colorado and the Atlantic States ; also Europe and Asia. 



H. FLUiTAN.s, Linn. Stems pinnate, erect or floating, in swamps or stagnant waters, \ to 1 

 foot lono' or more ; leaves loosely imbricated, flaccid and often not falcate-secund, long-lanceolate 

 and acuminate, nearly entire, costate to above the middle : annulus none : ciliol* often imperfect 

 or united. —Hedw. Muse. Frond, iv. 94, t. 36 ; Eng. Bot. t. 1448 ; Bruch & Schimp. 1. c, t. 602. 

 Oregon {Hall) ; Uinta Mountains {Watson) ; from Arctic America to the Atlantic States, and in 

 Europe and South America. 



* * Stem more or less regnlarly pinnate : leaves crowded and falcate-seaind in 

 one or two ranks, shortly bicostate or nerveless: areolation narrowly linear, 

 quadrate at the angles. — Drepanium. 



39. H. fertile, Sendt. In soft depressed subcircular bright green and yellowish 

 tufts, densely piunately branched : leaves somewhat 2-ranked, narrowly lanceolate 

 and attenuate to a hair-like apex, strongly incurved, subcircinate when dry, minutely 

 serrulate at the apex, the lower margin retlexed, very obscurely bicostate at base : 

 flowers monoecious : capsule oval or oblong, ceriuious, subarcuate, brownish above, 

 paler below, with broad annulus and large convex-apiculate operculum. — Bruch & 

 Schimp. 1. c, t. 591. 



On rocks in the Calaveras Grove {Bolandcr) ; Europe. 



40. H. subimponens, Lesq. Stems procumbent, sparingly branched, slender, 

 the brandies closL-ly phimose-pinu.ite : leaves strongly falcate-secund, ovate- to oblong- 



