265 
minata, wmargine et dorso dense ciliata, 10—20 mu. Ig., 
2-5 mm. lt. Flores ad caulis apicem’dichasium valde com- 
positum formantes, bifurcationum ramis diffusis, alternis fere 
semper abbreviatis, longe pedicellati, pedicellis capillarihus 
dense pubescentibus; bracteae parvae folia aeqnantes. Ca- 
lyeis profunde 5-partiti lobi ovato-lanceolati acuminati, mu- 
cronati, carimatı, carıma viridi dense piloso, ceterum mem- 
branacei ac glahrescentes, 4—5 mm. Ig., 1—1'2 mm. It. 
Petala alba oblonga acutiuseula, calyce triente breviora. 
Capsula ovato-oblonga longe e calyce exserta, pleiosperma. 
Semina atra, sphaeroideo-lenticularia, laevia, nitida, parva. 
— „Arenariae diffusaeEli. affınis, fortassis speeies nova “ 
Peyritsch! in Linnaea XXX, 58. 
Habitat in republica Mexicana: in loeis paludosis (Schaffner 
2971), Real del Monte et Cerro ventoso (C. Ehrenherg!), 
San Miguel prope Toluca 2770 m. (Heller 3691). 
Species priori valde affınis, tamen inflorescentia distinctis- 
sima prime aspeetn diversa est. Etiam ad speciem se- 
quentem accedit, quac habitu, calyeis structura, petalis 
obtusis et caulis pubescentia distingui potest. 
18. Arenaria Poeppigiana Rohrh. (n. sp.) 
Canles humifusi longe repentes, quadrangulares, rameos 
plurimos breves foliosissimos steriles, pancos elongatos mi- 
nusque dense foliatos, apice floriferos, laxeqne adscendenti- 
erectos, 5—20 em. altos, edentes, aeque ac ramuli pilis bre- 
vibus simplicibus stellatisque intermixtis hirtulo-pübescentes. 
Folia linearia vel anguste lineari-lanceolata, apice longe 
"acuminata, ad basin versus suhattenuata, plus 'minusve dense, 
praesertim ad marginem nervumgue medianum, puberula, in 
