119 
A Pilotricho ambiguo differt: foliis longe acuminatis serrulatis; 
a P. auronitente statura angustiore elongata, ramis pendulis, nec 
brevibus secundis. 
11. P. auronitens Hornsch.; Fl. Brasil. ibid. ; 
In vicinia Rio de Janeiro: Glaziou (4525, 4551); primus 
Martius; adhuc solum sterile notum. 
e. Pinnatella C.M. Insertæ sedis. 
Transit ad sectionem Callicostellæ. 
Fere omnia adhuc sterilia, exclusa Weckera elegantula Griffith., 
herbar. 21 (a me visa). 
12, P. Thieleanum C.M., Syn. II, pag. 227. Syn. P. pinni- 
forme Fl. Brasil. I, pag. 57. 
; Hab. Brasiliæ: Sello; e Monte Video accepi. 
15. P. microthamnium Hpe. in j 
Minus; surculus stolonifer, radicans.  Caulis adscendens vix 
uncialis, basi squarroso-foliatus, superne coma pinnatim ramosa, 
arbusculiformi, vel flabellata, semicirculari vel lanceolata, ramis 
Tamulosis 2—3' filescentibus  attenuatis.  Folia caulina reflexo- 
Patula, basi impresso-concava, amplexicaulia reniforme-cordata subito 
Caniculato- acuminata , enervia, cellulis alaribus parvis, ovalibus, 
Cæteris anguste ellipticis, omnibus pellucidis; folia ramorum. accum- 
bentia basi latere plicata, cordata, breviter acuminata, subintegerrima, 
hervo lutescente percursa, cellulis dense me rotundatis, 
8Tanulatis, pellucidis; 
In vicinia Rio de Janeiro, sine numero: Glaziou. 
Stirps juvenilis, nec cum Tamariscellis commutanda. 
14. P. tenuicostata Hpe. 
Surculus repens; caulis humilis, adscendens distiche pinnatim 
TåMosus, pallide lutescens. Folia caulina inferiora breviora, superiora 
"longiora, oblique inserta, subdistiche patula, cymbiformiter concava, 
Margine. erecto, e basi parum latiore elliptico ligulata,. acuta, 
" SUTsum serrulata; nervo tenui superne (2/4) evanido; cellulis dense 
Seriatis brevibus parallelogrammicis, nodulis parvis scabridis inter- 
