326 BRYACE^. [HT/pnutn. 



Drumm. Muse. Amer. n. 136. JT. tamariscinum, Sulliv. & 

 Lesq. Muse. Bor.-Araer. Exsiee. n. 272. llmidium delicatuluni. 

 Mitt. Jouni. Linn. Soc. xii. 578 ; Lindb. 1. c, fig. 8. 



HAii. Same as the preceding. 



From the observations of I^iudberg there has been a confusion of the 

 species of this group. The true H. taniariscinum has not been found in 

 North America, or is here very rare, and tlie specimens distributed under 

 tliis name in Sulliv. Muse. Allegh. and Sulliv. & Lesq. Muse. Bor.-Am. 

 Exsicc, and in Austin's Muse. Appal, represent mostly//, delicatulum, 

 while those distributed as //. delicatulum mostly represent //. recoyiiitum. 

 If, as it seems, we have only two species, //. recognituiii and //. delica- 

 tulum, they are very easily identified by the characters of the pericliietial 

 leaves. The character of the apical cells of the branch-leaves, which 

 essentially separates //. tamariscinwn, has not been remarked by any 

 American bryologist. 



* * * * Stems erect, simply pinnate, ramulose : operculum 



convex, conical. 



15. H. abietinum, Linn. Dioecious: i^lants in wide yel- 

 lowish green tufts ; stems simple or bij^artite, slightly radieiilose, 

 pinnately divided into short nearly equal branches : stem-leaves 

 close, broadly ovate, long-acuminate, deeply sulcate, costate and 

 canaliculate to below the point ; borders flat on one side, re- 

 flexed on the other; branch-leaves ovate-acuminate, very con- 

 cave, irregularly denticulate on the borders, all very papillose ; 

 paraphyllia crowded, loricate-filiform; inner perichastial leaves 

 long, lanceolate-acuminate, sulcate, entire : capsule narrow, 

 cylindrical, slightly incurved, arcuate when empty, chestnut- 

 colored ; operculum conical, acuminate ; cilia two or three, 

 unequal and irregular ; annulus large, compound. — Spec. Plant, 

 1126. T/midlum abietinum, Bruch & Schimp. Bryol. Eur. 

 t. 485. 



IIab. Shaded rocks and barren ground bordering woods; not rare, but 

 fruiting specimens very rarely found; Rocky Mountains of Colorado 

 {Porter), in fruit. 



16. H. Blandovii, Web. & Mohr. Monoecious : tufts bright 

 gi-een; stems long, 2-3-parted, covered with parai>hyllia ; 

 branches close, distichous, attenuated, flexuous or recurved : 

 stem-leaves large, imbricate, broadly ovate-cordate, acuminate, 

 irregularly plicate lengthwise, reflexed on the borders, papillose 

 on the back, with long ramose basilar cilia; areolation oblong, 

 loose, soft ; branch-leaves broadly ovate, short-acuminate, plicate, 

 entire, all costate to below the apex; paraphyllia very long, 



