PoLYTRiCHACE^.j 40 [C atharinca . 



Oligotrichum aiiduJatiun Lam. De C. F1. franc. 3 ed. ii. 492 (1805). 



Atrichum tindulatum P. Beauv. Prodr. 42 (1805). Br. Schimp. Bry. eur. iv, Mon. 8, T. 

 1-2 (1844) ; Syn. muse. 433 (i860), et 2 ed. 528 (1876). WiLS. Bry. Brit. 203, t. x {1855). 

 Jens. Bry. dan. t. 3, f. 14 (1856). Berk. Handb. Br. m. 212, t. ig, f. 4 (1863). Milde 

 Bry. Siles. 246 (i86g). De Not. Epil. Briol. Ital. 343 (i86g). Hobk. Syn. br. ra. 100 

 (1873). HusN. Mouss. Nord-Ouest 133 (1873). 



Catli. Ehrharti VoiT Muse, herbip. 17 (1812). 



Callibryum undulatum Zenk. Dietr. Muse. Thur. n. 41 (1822). 



Paroicous and polyoicous ; gregarious in wide, bright green patches. 

 Rhizome much branched, the roots twisted together hke a cable ; stems 

 erect, i — 3 in. high, simple or biiid, nearly naked below. Leaves rather 

 lax, not sheathing, concavo-carinate, patulous and flexuose when moist, 

 strongly curled and twisted when dry ; lower small, ovate, scale-like, 

 inserted obliquely, the rest increasing in size to the coma, lanceolate, 

 ligulate, and linear-elongate, transversely undulate in the upper half, 

 with a narrow rufescent border of two rows of narrow cells, bearing for 

 greater part of its length callose teeth, usually in pairs, nerve vanishing 

 in the rather acute apex, which is beset with spinules at back in trans- 

 verse rows ; cells rather large, rounded and subhexagonal ; lamellae 

 3 — 6, subundulate, in section each of 4—5 nearly equal rounded cells. 

 Perichastial bracts, resembling the comal leaves but longer and narrower. 



Pedicel as long as stem, bright-red, erect, twisted to the right in 

 upper part when dry, single or in pairs ; capsule pachydermous, brown, 

 cylindric, inclined, arcuate, with a very short neck : lid from a hemi- 

 spherical purple base, subulato-rostrate, the beak slender, long as 

 capsule, straight or curved downward or upward ; teeth longish, orange 

 in the axis, basal membrane rufescent. Male infl. terminating the first 

 year's stem, the same axis growing on and producing female the next 

 year ; perigone cup-shaped, bracts numerous, inner broadly cuneiform- 

 truncate with a crenulate, recurved point, and thin nerve. 



Hab. — On clay or sandy soil in woods, by the side of paths and on hedge- 

 banks. Common. Fr. 11 — 12. 

 Schimper records that occasionally the stem produces fruit the first year 



without any preceding male inflorescence. 



Var. yS. Minor {Hedw.) Web. Mohr. 



Stem short ; leaves crowded, shorter, less undulated. Capsule suberect, 

 ovate-oblong, unequal, on a shorter pedicel. 



Syn. — Polytrichum undulatum var. ^. minus Hedw. Stirp. crypt, i, 43, t. 17, {. 14 — 21 (1787), 

 et Sp. muse. 98. Wahlenb. F1. lap. 349. Mackay F1. hib. P. 2, 27. 



Pol. (Catharinea) controversum Rohl. Moosg. Deutsch. 206. 



Oligotrichum undulatum var. /3. minus Lam. De C. F1. franc. 



Cath. undulata /3. minor Web. Mohr Bot, Taseh. 217. Brid. Mant. muse. 204; Bry. 



univ. ii, 104. 

 Atr. undulatum var. y. abbreviatum Bry. eur. 

 Cath. undulata var. yS. abbreviata Rabenh. Deutsch. Krypt. Fl. ii, P. 3, 233. 



