COLLECTED IN TROPICAL AFRICA. 
53 
Leskea, Hedw. 
L. srBFALCATA, Mitten. Monoica; foliis caulinis hastato-subulatis caulem vest it um lati- 
tucline ae quant ibus, e ba si patula erectis, marginibus minutissime crcnulatis wibinte- 
gerrimis, nervo valido in a pice evanido, cellulis mimitis rotundatis obscuriusculis ; 
rameis ramulinisque subi'alcatis patenti-incurvis compressis li-ulato-lamvolatis. 
apicibus latis subacutis, nervo pallido sub apice evanido, marginibus miimtissime 
crenulatis, dorso minute papulosis; pcricha>tialibus e basi ovali longe subulatis 
attenuatis integerrimis, nervo percurivnte, cellulis elongatis pellucidis; theca in 
pedunculo rubro asperrimo. — L. grata siniillima. 
Hab. Moist rocks. Onitscha ; River Niger (Barter, 1424). 
Barter 
its ramuli being ligulate and not ovate, and by its entire periductal leaves. 
Tab. V. fig. 7. 1. Plant (of the natural size); 2. a cauline leaf, 3. a leaf from the branches, 4. peri- 
chaetium and male flower (magnified). 
s 
L. Nigeriana, Mitten. Monoica synoicave, caule foliolis vestito ; foliis patentibus bastato 
ovatis acutis, nervo percurrente, marginibus minute crenulatis, cellulis rotundati; 
minutis obscuris papillosis; rameis divergentibus complanatis panun asyminetrieil 
ovato-lanceolatis acutis, nervo sub apice evanido, marginibus crenulatis ; pericha,' 
tialibus erectis, e basi lata ovata longe (interdum subito) in subidam contractis 
paucis crenatis integerrimisve ; tlieca in pedunculo elonga 10 rubro asperrimo ovali 
horizontali cernuave, operculo subulato aequilongo ; peristomio externo dentibus valde 
trabeculatis-, interno processibus subsolidis ciliis in unum coalitis aequilongis inter- 
positis. — L. grata? similis. 
Hub. River Niger (Vogel). 
Resembling very nearly L. grata — Hypnum gr at um, Beauv.; but its branches more generally simple, 
cauline leaves not incurved from a patent base, those of the ramuli longer, divergent, and very much com- 
pressed, the perichaetial leaves longer and not lacerate. From L. s 
cauline, and less ligulate ramuline leaves. 
ibfalcata 
f ab. V. fig. 8. 1. Plant (of the natural size) ; 2. a leaf from the stem, 3. a leaf from the branches, 4. a 
perichajtial leaf, 5. capsule (magnified). 
Callicostella, Mitten, Muse. Ind. Orient. I. c. p. 130. 
C. africana, Mitten. Synoica, liabitu staturaque C. Merkelu ; foliis in series denas 
dispositis compressis, marginibus e medio ad apicem argute serrulatis, nervis binis ad 
apicem percurrentibus ibique dorso serrulatis papillosis; seriebus tribus dorsalibus 
reliquis dimidio fere brevioribus erecto-patentibus appressis ovatis obtusis brevi- 
acuminatis, cellulis parvis abbreviatis fere rotundatis subobscuris ; seriebus lateralibus 
utrinque binis patenti-divergentibus e basi ovata uno latere inflexo-lin^ulatis obtusis 
apiculo brevi semitorto, cellulis superioribus oblongis, inferioribus laxioribus prosen- 
chymaticis ; serie ventrali media cauli parallela appressaque ovato-lanceolatis brevi- 
acuminatis, cellulis laxis prosencliymaticis fere laevibus ; pericbsetialibus patentibus 
e basi ovata in acumen lanceolatum angustatis ; tlieca in pedunculo elon^ato flex- 
