302 MUSEO NACIONAL DE BUENOS AIEES. 



numerosis, coroUis alhidís 5-dejitatis cylindraceis, staminibus 

 prope basin tubi corolUni insertis, stylo filiformi longe exerto, 

 ovario 5-costato glabro. 



Hab. In aridis saxosis prope Clionkenk-aik secus Rio Chico, 

 Febr. 1898 et inter S. Julián et Rio Deseado, veré 1899 (C. A.). 



Obs. Species liabitu Gamocarphae Poeppigii DC. simillima, 

 sed pedunculis capitulorum fere nullis, paleis receptaculi de- 

 f ectu, corolla cylindracea staminibusque e basi corollae exsur- 

 gentibus niox distinguenda. 



Rbizoma profundiuscule delitescens, ramis tenuibus snbcar- 

 nosis (5-10 cm long. = 1-1,75 mm crass.) bypogaeis albidisv. 

 subcarneis nudis ramiüosis; caules subnulli brevissimi (5-10 

 mm long. =1-2 mm crass.) e eolio ramulorum rliizomatis ad 

 sujDerficem soli solitariiv, 3-4-nati erectiusculi v. subdecum- 

 beiites densiuscule subfasciculatim foliosi, simplices v. brevis- 

 sime divisi; folia viridi-glauca subcaraosula, erectiuscnla v. 

 patentia, limbis spathulatis, oblanceolatis v. obovatis (10-20 

 mm long. = 4-8 mm lat. aj)rt.) semper eximie complicatis 

 rectis V. saepe deorsum arcnatis, ápice obtusis v. obtusissimis, 

 margine integerrimis, basi sensim attenuatis ac in petiolum 

 breviorem v. subaequilongum tennem pallidiorem j^roductis. 

 Capitula ad apicem caulium v. ramululorum sessilia v. sub- 

 sessilia turbinata (7-9 mm long. = 5-G mm diam.) erecta, 

 15-30-flora, involucro obconoideo submembranaceo margine 

 5-8-dentato, dentibus quandoque brevissimis subtriangulari- 

 bus quandoque elongatis majusculis ovatis, ómnibus semper 

 obtusis, flores non v. vix aequantibus, receptáculo conoideo 

 paleis destituto laevi v. tuberculoso ; flores dense constipati, 

 ovario 5-angulato-costato (2-2,5 mm long. = 1 mm diam.) 

 glabro deorsum obtusiusculo ajDice truncato minute obtuseque 

 5-lobulato, corollis cylindraceis (-Imm long. = 1 mm diam.) 

 glabris albidis breviter obtuseque 5-dentatis, staminibus 5 

 projie basin tubi orientibus, stylo filiformi glabro ápice non 

 incrassato longe exerto ornatis. 

 972. Gamocarpha Ameghinoi Speg. = Boopk? Amegldnoi Speg., 

 Nov. add. ad Fl. Pat., n. 186. 



Hab. In declivio denudato aridissimo montium Karr-aik 

 prope Lago Argentino, Mrt. 1898 (C. A.). 



Obs. S^Decies cajiitulorum fabrica melius sub Gamocarpha 

 militare videtur; corollae glaberrimae (5 mm long. = 2 mm 

 diam.), staminibus 5 ad faucem v. parum infra tubi corollini 

 insertis. 



