BENTHAM ON JMlMOSE^. 351 



** HuMiLES. Fruticuli humiles, foliis parvis paucis v. nullis. 

 Glandula antherarum minuta fugacissima v. nulla. 



13. P. denudans {sp. n.), ramulis brevibus flexuosis foliis- 

 que puberulis, spinis axillaribus solitariis validis rectis, pinnis 

 unijngis, foliolis 2 — 3-jugis parvis oblongo-llnearibus, spicis 

 oblongis pedunculatis, antheris eglandulosis, legumine com- 

 presso contorto-arcuato. — Spinse, folia fasciculata, glandulaj 

 petiolorum, petala intus lanata, antherse ovatse, legumina, 

 omnia Algarobiarum praecedentium. Rami crassi breves. 

 Foliola 1 — 1^ lin. longa. — Port Desire in Patagonia; Mid- 

 dleton. — Although 1 have been able to discover no gland on 

 the anther of this species, scarcely any on those of P. humilis, 

 and but a very small and fugacious one on P. sericantha, yet 

 all the other characters are so much that oi Prosopis, that I 

 cannot but consider them as congeners. 



14t. P. humilis (Gill. ! in Hook. Bot. Misc. iii. 204.), ramu- 

 lis striatis glabris, spinis axillaribus solitariis geminisve elon- 

 gatis striatis, foliis abortivis v. ad petiolum parvum glanduli- 

 ferum I — 2-foliolatum reductis, spicis cylindricis peduncu- 

 latis glabris, antheris obscure glanduliferis v. nudis, legumine 

 compresso falcato — Pampas of Buenos Ayres, Gillies. San 

 Jago and Patagonia, Tweedie. 



15. P. sericantha (Gill.! 1. c), ramulis teretibus spinescen- 

 tibus leviter puberulis aphyllis, spicis cylindricis subsessilibus 

 pubescenti-incanis, glandula antherarum parva stipitata, legu- 

 mine compresso rectiusculo. — Prov. San Luis, Gillies. 



Sect. IV. Strombocarpa. Petala apice intus lanata. Ovari- 

 um villosum. Legumen crassum v. suhteres cochleato-con- 

 tortum sapius spirale. Fruticuli American!, stipulis spi- 

 nescentibus armati, spicis oblongis v. seepius globosis. 



IG. P. torquata (DC. Prod. ii. 448.), ramulis foliisque 

 minute viscido-puberulis glabrisve, stipulis spinescentibus 

 subulatis, foliorum petiolo brevissimo, pinnis 1-jugis (rarius 

 bijugis?) foliolis 15 — 25-jugis parvis linearibus obtusis, spicis 

 folio longioribus, legumine subcompresso moniliformi irregu- 

 lariter subspiraliter contorto. — Prov. San Luis, Gillies. 



