NOVA A.DDENDA AD FLORAM PATAGONICAM 173 



foliis pusillimis triangulari-ovatis subbiformibus , caulinis 

 minoribus argentéis, subfloralibus latioribus pallescentibus, 

 floribus acrogenis solitariis brevissime pedicellatis foliis sub- 

 floralibus late cupulato-cinctis, siliculis minoribus obovato- 

 oblanceolatis pedúnculo folio non superante fultis. 



Hab. Jn praeruptis aridissimis loco Orr-aik dicto, prope Lago 

 Viedma, Mart. 1898 (C. A.)- 



Obs. Species praecedenti sat afíinis et forsan ejusdem varietatem 

 minorem sistens, habitu ita ad Benthamiellam pycnophylloi- 

 dem accedit ut, plantae ulriusque generis floribus destilutae 

 peraegre ¡nter se distinguendae. Gaules densissime botryoso- 

 ramulosi, pulvinulos convoxo-applanatos (5-12 cm diam. = 

 25-30 mm crass.) compactos duriusculos efficientes, ramulis 

 leretibus (2-2,5 mm crass.) v. e mutua pressione subhexa- 

 gonis, totis dense loricalo-foliatis. Folia subdimorpha, omnia 

 tamen glaberrima arete adpressa, infera v. vetusta arescentia 

 sordide cinereo-nigricantia, supera et viva albo-argentea niten- 

 tiuscula, crassiuscula subcoriacella rigidula, ad epiphyllum 

 concaviuscula, ad hjpophyllum convexula non carinata nec 

 costata, sursum cuneato-rotundata oblusiuscula, margine 

 superne nuda inferné plus minusve ciliolato-pectinata, ciliolis 

 minutis hyalinis rectis v. subretrorsis, caulina ovata supra 

 basin leniter coarctata argéntea nitida (2 mm long. = i mm 

 lat.), subfloralia v. suprema triangularia basi non coarctata 

 sed magis dilatato-amplexicaulia magisque obtusa et rigida 

 (3 mm long. = 1,5 mm lat.) ex albo ochroleuca opaca ad 

 apicem ramulorum fere cupulam efformantia. Flores in 

 ramulis acrogeni solitarii inter folia subfloralia (una cum 1 v. 

 2 gemmis foliaceis pusillis) fere absconditi, pedúnculo bre- 

 vissimo (1 mm long,) fulti, obovati v. obconici (1,25 mm 

 alt. =1,50 mm diam.) ex albo achroleuci (in sicco!); sépala 

 glabra obovato-cochleala antice obtusa subcucullata postice 

 cuneato-attenuata (1,25 mm long. = 1.50 mm. lat.) pétala 

 glabra alba obovata superne obtüsissima leniterque undulata, 

 deorsum cunéala atque breviterattenuato-unguiculata sepalis 

 non V. vix longiora ; stamina 6 subaequilonga pétala fere 

 aequantia, antheris albis ellipsoideis, filamenta concoloria 

 glabra triplo superantia; ovarium minutum obovatum vire- 

 scens, stylo brevi sensim in stigmate turbinatulo sublobulato 

 dilátalo coronatum. Siliculae lignicolores pedúnculo crasso 



