HERBERT A. 99 



antli X 24. 17- Portion of the mouth of the perianth x 85. (All 

 drawn from plants collected by Mr. West, Ben Lawers.). 



Genus 8. HERBERT A, Gr. 8f B. 



Herherta, Gr. & B. Nat. Arr. Brit. PI. 1, p. 705 (1821). 



Schisma, Dum. Comm. p. 114 (1822). 



Sendtnera, Nees in G.L.N. Syn. Hep. p. 288 (1845). 



Dioicous ; large ; reddish-brown ; slightly branched ; branches 

 postical ; subfloral innovations sometimes lateral. Leaves incubous 

 or almost transverse, tristichous, hamato-secund, narrow, much 

 longer than broad, sometimes ciliate at the base, otherwise entire, 

 deeply bilobed, lobes narrow, acuminate, vittate. ? flowers 

 terminal. Bracts denticulate, ciliate or spinose, distinctly bisul- 

 cate. Perianth almost hidden by the bracts ; very narrow, ovate- 

 subulate, tricarinate. Calyptra free, small, obovate, deeply 

 trifid, composed of one layer of cells. Capsule globose, 5-8 cells 

 thick ; valves 4 sometimes 2-6. Elaters bispiral, long, persistent. 

 AndrcBcia on short terminal spikes ; perigonial bracts few, some- 

 what similar to the leaves. Antheridia 2 in each bract. 



1. Herberta adunca {Dicks.), Gr. ^ B. 



Jungermania adunca, Dicks. PI. crypt. Brit. fasc. Ill, p. 12 (1793). 

 Jungermania junijierina b. adunca, Hook. Brit. Jung. t. 4 (181G). 

 Herherta adunca, Gr. & B. Nat. Arr. Brit. PI. p. 705 (1821). 

 Schisnut adunca, Dum. Comm. p. IIG (1822). 



Sendtnera junijoerina var., Nees in G.L.N. Syn. Hep. p. 239 (1845). 

 Sendtnera adunca, Carr. in Trans. Bot. Soc. Edin. 11, p. 454 (1803). 



Dioicous, densely csespitose, from medium to very large in 

 size, reddish or dark brown in colour. Stems erect, flexuose 

 simple or with one or two short assurgent or pendulous postical 

 branches, flagella frequent, bearing minute leaves, branches and 

 apices of stem very often hamate, firm, opaque, the outer layers 

 of cells (to the 2nd or 3rd) reddish-brown, inner paler, full of dark 

 green colouring matter, cells small, walls ver}^ thick, cortical cells 

 about 50; about 16 in diameter. Leaves incubous or almost 

 transverse, imbricate or approximate, tristichous, falcate-secund, 



