364 BENTHAM ON MIMOSEiB. 



18. M. casta (Linn. Spec. 1500.), fruiicosa, aculeis re- 

 trorsis, raniulis petiolisque glabris, foliolis 3 — 4-jiigis oblique 

 oblongis lanceolatisve acutis marginatis setuloso-ciliatis gla- 

 bris V. subtus sparse strigosis, pedunculis vix capitulo longi- 

 oribus, bracteolis corollas subsequantibus, leguminis valvulis 

 articulatis glabris nudis, margine setoso-aculeatis. — Martini- 

 ca; Sieber, Ji. 173. 



19. M. tricephala (Cham, et Schlecht. ! Linnaea, v. 591.), 

 fruticosa, aculeis rectis, raniis petiolis pedunculisque pubes- 

 centi-scabris, stipulis subulatis parvis, pinnis petiolo pluries 

 longioribus, foliolis 10 — 15-jugis oblique ovato-oblongis 

 niucronatis leviter marginatis setuloso-ciliatis supra glabris 

 nitidis subtus strigosis, capitulis globosis, bracteolis corolla 

 brevioribus, calyce longiuscule ciliato. — Mexico; Schiede, 



20. M. retrorsa (sp. n.), fruticosa, divaricato-ramosa, acu- 

 leis uncinatis retrorsis, caule setulis brevibus retrorsis scaber- 

 rimo, stipulis lanceolatis, pinnis petiolo subduplo longioribus, 

 foliolis 12 — 20-jugis oblongo-linearibus falcatis obtusiusculis 

 marginatis setuloso-ciliatis utrinque glabris, bracteolis corol- 

 1am subsequantibus, capitulis globosis, calyce minuto ciliato, 

 leguminis valvulis articulatis sparse, margine dense aculeato- 



setosis — Brazil; Sello Foliola 4 — 6 lin. longa, 1^ lin. lata, 



interdum leviter glaucescentia. 



21. M. dolens (Veil. Fl. Flum. 11. t. 34.), suffruticosa, 

 aculeis patentibus rectis nunc minimis, caule erecto subra- 

 moso petiolisque glanduloso-hirtis asperis, pinnis petiolo plu- 

 ries longioribus, foliolis 10 — 12-jugis oblique oblongis obiusis 

 mucronatisve coriaceis marginatis setuloso-ciliatis glabris v. 

 subtus inferioribus strigosis, capitulis globosis hirtis, bracte- 

 qHs corollas aequantibus superantibusve, calycibus longiuscule 

 ciliatis, legumine undique dense setose valvulis indivisis. — 

 Prov. Minas, and Rio Janeiro; Martins, Sello. — The speci- 

 men received from Martins with the n. 1090, and marked in 

 his catalogue " M. vieticulosa, Mart. var. major ?" appears to 

 me to be referrible to M. dolens, it has both the prickles and 

 glandular hairs of this species, and Martins describes his 3/. 

 meticuloaa as being without either. 



