﻿344 Plantae nocae nonnuüae. 



Amarantellus argentinus Speg., n. sp. 



Diag. Caules glábrati o. puberuli, rubicundi v. virides 

 obsoletissime striati, foliis viridibus inferné pallidioribus 

 nervis pinnatis valde pro ni inidis albescentibus notatis. pe- 

 tiolis limbum subaequantibus suff'ultis, glomcrulis axilla- 

 ribus parvulis, saepius geminatis, apicalibus racemum 

 parum elongattan crassum eff'ormantibus, bracteis ellipticis 

 et bracteolis duplo longioribus oblanceolatis mucronulatis 

 gláberrimis, utricidis pallide virescentibus laevibus. 



Hab. Frequens ad viarum latera in La Plata, Oct. 

 1901. 



Obs. Radix verticalis teres (5-10 cm long. = 2-5 mm 

 crass.) laxe ramosa subcarnosula albescens; caules e eolio 

 ímmerosi, deorsum decumbentes sursum arcuatim erec- 

 tiusculi, teretes (15-50 cm long. =2-4 mm crass.) pal- 

 lide virescentes v. plus minusve rubicundi v. jjurpura- 

 scentes, primo ]axe molliterque puberuli dein glabriu- 

 sculi v. glaberrimi, obsolete longitrorsum striati saepeque 

 leniter torti, internodiis infimis et supremis parum re- 

 motis (5-15 mm long. ), mediis plus minusve elongatis 

 (30-70mm long.); folia internodia aequantia v. longiora 

 alterna, limbis subcrassiuscule membra nacéis ovatis 

 (10-30 mm long. = 6-20 mm lat. ), ápice acutiusculis v. 

 saepius obtusis atque retusis ob nervum medianum excur- 

 rentem minute mucronulatis, margine integerrimis vix un- 

 dulatis, basi rotundato-cuneatis, ad epiphyllum viridibus 

 medio saepe macula cinerascente v. purpurea transversa 

 maculatis, gláberrimis, ad hypopliyllum pallidioribus v. 

 snbeinerascentibus, glabris v. obsoletissime puberulis 

 nervis pinnatim 5-7-jugis albescentibus valde prominu- 

 lis notatis, petiolis limbo parum brevioribus (5-18 mm 

 long.) dorso convexi ventre canaliculatis gláberrimis do- 

 nata. Racemuli semper geminati, inferi ad basin ramu- 

 li axillaris fere stipulares, superi in racemo quandoque 

 rubicundo quandoque flavido simplice v. vix composito 

 (30-80 cm long. = 10-20 mm crass.) spiraliter (Va) dis- 

 positi, ima basi bracteati, bracteis ovatis acutis mucro- 

 natis hyalinis vix ñervo dorsali tenui viridi notatis, pedi- 



