484 
XV. MUSCI. 
[ Rhizogonium . 
secuud, obovate-rotundate, apiculate, concave, quite entire, auricled at the 
base; nerve produced to the middle, sometimes forked. Fruit unknown. 
Northern Island: Auckland, on trees, Knight, Sinclair. 
65. RHIZOGOmUM, Bridel. 
Stems or branches erect, from a creeping rhizome; tufted, simple, rarely 
branched, rigid, often compressed. Leaves rigid, distichous or imbricate all 
round, simply or doubly spinulose, serrate; cells very lax, minute; nerve 
stout. Fruitstalk lateral, from the bases of the stems, rarely from the side, 
slender, long. Capsule inclined, suberect or nodding ; peristome of Hypnum. 
Operculum usually beaked. Calyptra subulate, cucullate. 
Tufted erect mosses, often very beautiful, common in tropical and subtropical and southern, 
temperate forests. 
A. Leaves distichous. 
a. Leaves simply toothed or serrate or quite entire. 
Leaves ovate-oblong, subobtuse ; nerve vanishing below' the ser- 
rulate apex 1 . 22. distich urn. 
Leaves ovate-oblong, denticulate ; nerve excurrent 2. 22. novce-Hollandice. 
Leaves oblong-lanceolate, quite entire ; nerve excurrent . . . 3 .JR. pennatum. 
0. Leaves doubly serrulate. 
Leaves ovate-lanceolate, acuminate ; nerve continuous . ... 4. 22. bfarium. 
B. Leaves spreading all round the stem , not distichous. 
Leaves spreading, linear-subulate 5. 22. spiniforme. 
Leaves erecto-patent, lanceolate-subulate, twisted when dry . . 6. 22 mnioides. 
Leaves spreading, linear-lanceolate 7. 22. subbasilare. 
1. R. distiehum, Bridel FI. N. Z. ii. 115. Stems in. high. 
Leaves dark green, distichous, coriaceous, ovate-oblong, rather obtuse, toothed 
at the apex ; margin not thickened ; nerve stout at the base, vanishing below 
the apex. Fruitstalk stout, 1 in. high. Capsule horizontal, oblong; oper- 
culum conical, beaked. Inflorescence dioecious. — R. Muelleri, Flamp. in 
Linnsea; Hypnum, Schwaeg. Suppl. t. 87. 
Northern and Middle Islands : common on stumps of trees, etc., Sinclair, etc. (Tas- 
mania and Australia.) 
2. R. novae-Hollandlse, Bridel ; — FI. N. Z. ii. 116. Stems slender, 
£-1 in. high. Leaves glossy, yellow-green, pellucid, distichous, often secund, 
rigid, oblong-ovate, acuminate, denticulate, margin scarcely thickened ; nerve 
excurrent ; cells rather large. Fruitstalk 1 in. high. Capsule horizontal, 
oblong, pale red ; annulus large ; operculum beaked, nearly as long as the 
capsule. Inflorescence dioecious. — Les/cea, Schwacgr. Suppl. t. 88 ; FI. Ant- 
arct. i. 136. 
Northern and Middle Islands: common on wood. Lord Auckland’s group 
(barren), J. D. H. (Tasmania and Australia.) 
3. R. pennatum, Hook. f. and Wils. FI. N. Z. ii. 116. t. 92./. 2. 
Stems 1 in. high, very slender and elegant. Leaves pale vellow-green, shin- 
ing, pellucid, spreading, distichous, oblong-lanceolate, acuminate ; margin 
thickened ; nerve excurrent, stout. Fruitstalk 1 in. high. Capsule suberect, 
