Grimmia. | 2. GRIMMIEX. 103 
23. G. CONVOLUTA (Mont. in Ann. Sc. Nat. ser. 3. iv. 122, Rhacomi- 
trium). Procumbens, dichotome ramosa, ramis fastigiatis, siccitate incur- 
vatis, brevissime ramulosis, sordide viridibus. Folia margine reflexa, 
integerrima, evanidinervia, madore subrecurva, sicca imbricata, firma, 
minute dense areolata; perichetialia convoluta, rotundato-obtusissima. 
Theca in pedunculo pseudolaterali erecto posita, calyptra striata glabra 
basi laciniata.— C. Müll. Syn. i. 802. 
Hab. Chili, in truncis arborum, C. Gay. 
Ex habitu G. patenti v. G. didyme proxima, ab ulteriore foliis acutius- 
culis et perichzetialibus convolutis rotundo-obtusissimis facile distinguitur. 
—C. Müll. l c. 
24. G. NIGRITA (C. Müll. Syn. i. 801). Folia patentia, nervo per- 
eurrente carinata, marginibus recurvis reflexisve, cellulis basilaribus parie- 
tibus longitudinalibus crassis valde crenulatis, transversalibus inconspicuis, 
superioribus subquadratis oblongisque indistincte transverse limitatis cre- 
nulatis obscuris; perichztialia breviora, oblonga, obtusiuscula, acuta. 
Theca in pedunculo breviusculo, elliptico-cylindracea, pallida, operculo 
subulato, peristomii dentibus rugulosis fissis, calyptra apice scabra. 
Rhacomitrium protensum, var., Hook. f. et Wils. et R. fasciculare, var., 
eorund. 
Grimmia symphyodonta, C. Müll. Syn. i. 809. 
Hab. Magellan, Hermite Island, J. D. Hooker; Sandy Point, Lechler ; 
Patagonia, Lobb. 
Caulis 1-3-uncialis. Folia 1} lineam longa, nigricantia. Pedunculus 
2-linearis. Theca lineam longa. 
Excepting in colour, there appears to be no difference between 
the specimens named respectively G. nigrita and G. symphyo- 
donta ; the foliage varies from green to yellowish brown and black. 
The stems in the specimens named OG. symphyodonta are more 
elongated ; but the ramification is that of Dryptodon, and not of 
Rhacomitrium. 
25. G. CYLINDRICA (C. Müll. Syn. i. S05). G. microcarpe simillima, 
sed differt statura majore robustiore, theca longiore anguste cylindrica.— 
C. Müll. Le 
Hab. Mexico, Pico de Orizaba, Liebmann. 
Sect. 5. Rhacomitrium, Brid. i. p. 207. 
26. G. CONTERMINA (C. Müll. Syn. i. 655). “ Dioica; G. lanu- 
ginose simillima sed minus lanuginosa, et folia in pilum angustissimum 
vix flexuosum subintegerrimum attenuata, levissima, profunde canalicu- 
lata, ubique fere margine valde revoluta, e cellulis ubique elongatis haud 
interruptis ad parietes punctulate crenulatis areolata.” 
Hab. America centralis, Costa Rica (5000-8000 ped.), Girsted. 
