104 Mastico-LEJEUNEA. 
innovation diverging slightly from the direction of the one preceding. 
In reality the innovations are double that number—cor more—for each 
main innovation has 2 (rarely 3) perianths at the apex, So near as often 
to touch each other; yet each upper perianth terminates an additional 
innovation, so short that it has only a single pair of leaves below the 
tlower. 
The calyptra in this and other allied species is rufous, clavato-pyriform, 
of firmish substance, and splits for the emission of the capsule regularly 
into 3 valves, whereof two are broader and oval, the third lanceolate; 
they are all obtuse, and are separate to or below the middle of the calyp- 
tra. This plainly indicates that the calyptra originates in the union of 
a pair of leaves, with their intervening foliole, precisely as the perianth 
does. 
3.- MAstigo-LEJEUNEA PLICATIFLORA, Spruce. 
Hab. In arborum cortice ramulisque, in sylvis fl. Negro humilioribus 
precipue (San Carlos) etiam ad fl. Orinoco cataractas (Maypures), 
rarius ad saxa prope Tarapoto Andium Peruvie. 
F 145x°85, 1:2x8, 1:0x°6; lob 3x°15; ¢ AA; f* 6x ‘65, “6x “75, 
4x °45; br 1°55 br 1°-4x1°0; per 15x 9, 15x -75™™. 
Late prostrato-czespitosa, vix stratificata, rufo- vel fusco-badia, apice vire- 
scens. Caules, e caudice longe repente subdiviso, 2-3-pollicares 
tenuiusculi horizontales pendulive vage ramosi, ramis pro more 
brevibus sepe prolifero-elongatis, raro dichoto mis, interdum assur- 
gentibus, aliis deflexis, subaphy llis microphyllisve, radicantibus. 
Folia plus minus imbricata, angulo recto divergentia, subdeflexa, siccando 
convoluta raro patentia e marginis postici inflexione subfalcata, ob- 
longo-ovatove-lingueformia, obtusa rotundatave, subrecte compli- 
eato-biloba ; lobulus 4-plo brevior ovato-rhomboideus subacutus, ad 
plicam inflatus, ceterum planus appressus, margine interno (siniis) 
cauli parallelo; cellule parvulz subopacze subelongatee thombeo- 
hexagon pachydermes, subbasales medi laxiores pellucidioresque. 
Foliola subduplo breviora, imbricata, subrotunda, v. cuneato-rotunda, 
raro reniformia, apice reflexo retusa obcordatave, margine basi re- 
curva, a basi ad 4 alt. canaliculato-impressa. 
Flores dioici: Q terminales, raro e dichotomia, innovatione pleramque 
unilaterali prolifera suffulti, Bractes foliis longiores, ultra # bifidee, 
lobo oblongo-lanceolato-ligulatove obtuso, lobulo subconformi duplo 
breviore ; bracteola magna late oblonga retusa emarginatave. 
Perianthia vix emergentia, pyriformia ‘oblongave, rotundato-truneata 
obsolete rostellata subcompressa, utraque facie 2-3-carinata, carinis 
marginibusque sublevibus raro rudimentarie alato-rugosis. 
Andreecia medio caule ramove posita; bracteze plurijuge foliis consecu- 
tiva paulo breviores confertioresque, subsequaliter bilobz basi turgide, 
diandre. 
Perianthia normaliter apicem versus 10-plicata, plica tamen una alte- 
rave laterali aliquando obsoleta, 7—-9-plicata fiunt. E plica media postica 
ceteris subvalidiore, perianthium in sectione trigonum evadit; ex quo, - 
necnon e foliis linguzformibus opacis, lobulo rhomboideo margine plano 
appresso; foliolis retusis, basi brevi insertis (unde facile solutis) affini- 
tatem aliquam cum Thysano-Lejeunea patet, majorem autem cum Mastigo- 
Lejeunea, e.g. cum M. L. auriculata (Wils.). 
Ad S. C arlos del Rio N egro adest var. tenuissima, elongata, subdicho- 
