The qilant has also a pleasant aroraatio scent.
D e sc r ip t io n oe P la t e CCIX.— Fig. 1. Sterile frond, natural
size. 2, 3. Male fronds, natural size. 4. Portion of cross-section
of frond x 24. 5. Portion of frond, postical layer of cells x 85.
6, 7. Scales from postical side of frond x 24. 8, 9. Female
receptacles,natural size. 10. Ditto, magnified (Bischoff). 11. (More
highly magnified (ditto). 12. Cross-section of same, magnified
(ditto). 13. Cafyptra (ci) and capsule (h) magnified (Bischoff).
14, Capsule, explánate x . 15. Cross-section of malo receptacle
x 11, IG. Antlieridium x 16.
Genus 47. REBOITLIA, Raddi.
Marchantía, Linn. Sp. pi. 1 ecL, 2, p. 1138; FL Lapp. (1753).
Asterella, p.p. Beaiiv. in Encycl. Meth. Suppl. 1, p.. 502 (181U).
RehouUa, KadcU in Act. soc. Modena .11, p. o57 (1818), (nom. em. Nees, 1846).
Frondose, fronds rigid, very indistinctly poroso, the midrib
broad, strong and distinct. Female receqitacle qiedunculate,
conical, bemispherical or plane, 1-G- (usually 4-) lobed, lobes
divided to about tbe middle, peduncle continuous with the frond,
barbulate-palaceous beneath. Outer involucre 1-fruited, coherent
with the lobes, 2-valved. Perianth wanting. Calyjffra oval,
minute, lacerate, qiersistent at the base of the capsule. Capsule
hidden by the valves of the involucre, greenish, subglobose, nearly
sessile, rupturing at the apex by irregular narrow teeth, or by a
fragmentary operculum. Spores tuberculate. Elaters moderately
long, mostly hispiral. Inflorescence monoicous. Andrcecia
sessile, lunate-dlsciforin.
Reboulia hemisphærica, Raddi.
Marckaniia hemis2)hoerica, Linn. Sp. pi. p. 1004 (1753).
Asterella hemisjihcerica, p.p. Beauv. in Encycl. Meth. Suppl. 1, p. 502 (1810).
Reboulia hemisphærica, Eaddi in Act. soc. Modena l ] , p . 357 (1818).
Monoicous, cæspitose, medium size, dark green above, purple
below and at margin. Pronds rigid, simple, bilobed or dicbotomously
branched, sinus often deep and narrow ; prostrate, flat,
costate, midrib broad and prominent, margin crenate, undulate ;
epidermis smooth ; below squamose, scales dark purple, imbricate,
quadrate-elongate; radiculose, rootlets copious, slender, white,
proceeding from the midrib. Female receptacle pedunculate,
suhrotund, afterwards hemispherical, deeply 4-5-lohed, proceeding
from the antical side of frond, at the base of the sinus ; surrounding
the base of the female peduncle, also at the apex, there are
long, white, silky, hair-like pirocesses, 1 and 2 cells wide.
Perianth wanting. Calyptra minute, lacerate, persistent at the
base of the capsule. Capsule composed of several layers, the
innermost without any spiral threads, g'lobose, rupturing irregularly,
teeth not revolute. Spores muriculate, pale yellow with
hyaline border when young, brown when old and dry. Elaters
very closely twisted, narrow. Antheridia narrow, numerous,
immersed in the antical, sessile, crescent-shaped discs.
Fruits in Spring and early Summer.
D im e n s io n s .—Pronds 1 to 2 inches long, 5’ to G' mm. broad;
female peduncle 1 to 2 inches long; spores T. mm. diam.; elaters
■35 mm. long.
H a b .— Or, dryish, exposed cracks of rock filled with earth.
Somewhat rare.
1. Extremely rare, Paul Hill, Cornwall, /P. 2. Hampshire.
3. Sydenham, Martgn; lane leading from liusthall Common
to the High Eocks; Lamberhurst Quarter, Jenner; Boro’
Green; Ightham; Halstead, Kent, E. M. Holmes. 4,5. Weaver
Hill, Staffordshire, if. Garner. 7. On rocks, Barmouth, Merionethshire,
Rev. T. Salweg, Dr. Carrington 8f IE. H. P. 8. Castleton,
Derbyshire, J. Whitehead. 9. Dalton Crag, Lano., ,T. A. Wheldon.
10. Ingleboro, Dr. Carrington; Dentdale, G. Siabler; Thornton
Force, W. West; Settle, II. P. Parsons; Malham Moor, W. West;
Ingleton, W. II. P. 11, 12. Among limestone rocks, Levens
Park, Westmorland, G. Siabler. 13. Back of Kenmure Castle,
New Galloway; rooks near Grennan, Dairy; about Kirkcudbright,
j . McAndrew. 15, IG. Rather common on exposed rocky banks,
Moidart, West Inverness, S'. M.. Macvicar.