SPEGAZZINI: NOVA ADDENDA AD FLORAM PATAGONICAM. 143 



495. Atriplex Ameghinoi Speg., n. sp. 



Diag. Ohione, monoica, annua? elata, tota suhargenteo- cine- 

 rea, foliis majusculis memhr anacéis dense minuteque siihpellu- 

 cido-punctatis ovatis v. hastatis integerrimis v. obsolete repando - 

 suhdentatis ohtusis suhtripUnerviis, inferís plus minusve longe 

 petiolatis, supremis sessilibus, floribus longe interrupteque stib- 

 spiicato-racemosis, thecis bractearum cunéalo- ovatis v. obtrian- 

 gulavibus subtruncatis margine 3-o-dentatis, superis submem- 

 branaceis subsessilibus, inferis crasse suberosis in disco utrimque 

 grosse bicristatis, ómnibus ad apicem fere usque connatis. 



Ilab. ISÍon rara in aridis subsalsis secus Eio Chubiit, Jun. 

 1899 ( A. Tonnellier ) et aest. 1900 ( C Burmeister, F. Basal- 

 dua ) , nec non secus Eio Chico, Mart. 1900 ( C. A. ). 



Obs. Herbácea, erecta (25-60 cm alt. ) subdense fastigiato - 

 ramosa; radix . . . . ; rami e eolio pliirimi erecti v. arcuato - 

 adscendentes crassi (3-6 mm diam. ) eximie pentagoni, angii- 

 lis obtiisiuscnlis, intns latissime medullosi, extus primo 

 adpresse cinéreo -lepidoti dein albicanti-lignicolores glabrati, 

 laxe foliati etramuiosi. Folia alterna, subtenuiter membrana- 

 cea, primo adpresse farinoso -canescentia dein snbglabrata 

 pallidissime glauco-v. cinerascenti-viridia, contra Incem in- 

 specta dense minuteque pellucido-lacunosula, subtriplinervia, 

 infera petiolo subaequante suffulta, media breviter petiolata, 

 suprema subsessilia v. plañe sessilia, limbis ovatis v. hastatis 

 ( 10-60 mmlong. =5-28 mmlat.) ápice obtusiusculis, basi 

 rotundatis v. truncatis semper plus minusve in petiolum cu- 

 neato-decurrentibus, margine quandoque integerrimis quan- 

 doque irregulariter grosse remotiusculeque repando -dentatis. 

 Flores ad nodos ramulorum gracilium elongatorum (25-150 

 mm long. = 1 mm crass. ) erectorum glomerulati, glomerulis 

 laxe interrupteque spicatis 3-10-floris, infimis foemineis, me- 

 diis androgynis, supremis masculis. Thecae bractearum ob- 

 triangulari-cuneatae ultra médium connatae infimae ad axil- 

 lam foliorum supremorum majusculae (4-5mm long. = 5-7 

 mm lat.), margine excepto, crasse suberosae, in disco utrimque 

 grosse l-2-tuberculato-cristatae,± ve pedicellatae, superae in 

 •glomerulis ramululorum aphyllis minores ( 3 mm long. = 4-5 

 mm lat.), non v. vix incrassato-coriaceae, in disco planae 

 exappendiculatae, omnes deorsum cuneatae, sursum subtrun- 

 cate ± ve valide 3 -5 - dentatae, farinosulo - canescentes. 

 Utriculus tenuiter rnembranaceus semine adnatus; semen len- 



