^ EOBLN'SON. — SPECIES OF MIMOSA. 321 



-t- -1- -(- -1- Leaflets 15 to 40 pairs : fruit over 1.5 cm. broad : armed shrub, not 



glandular. 



34. M. platycarpa, Bentii. Thorns scattered, recurved : pinuge 6 

 to 10 pairs; leaflets 15 to 25 pairs, linear, 2 to 3 mm. long: spikes slen- 

 der, loosely flowered : fruit stiped, flat, glabrous, nearly 4 cm. in length. 

 — Trans. Linn. Soc. xxx. 417. — Guatemala, Skinner (ace. to Beuth.). 

 Description compiled. 



-)- -t- 1- -t- -(- Leaflets 22 to 40 pairs, linear-oblong: stem arborescent ; branches 



armed, glandular-pubescent. 



35. M. Cabrera, Karst. Small tree armed with scattered straight 

 spines: pinnge 5 to 8 pairs; leaflets 18 to 35 pairs, 5 mm. long, concolor- 

 ous, pubescent upon both sides : flowers somewhat verticillate in long 

 flexuous interrupted spikes : legume flat, pubescent. — Fl. Colomb. ii. G3, 

 t. 132; Benth. Trans. Linn. Soc. xxx. 416. ? 3L tenuijlora, Poir. 

 Suppl. i. 82, not Benth. ? Acacia tenuijlora^ Willd. Spec. iv. 1088. — 

 ? San Salvador, Wendland (ace. to Benth. & Hemsl.) ; Valley of Com- 

 ayagua, Honduras, Niederlein. Northern S. America. If Bentham is 

 right in stating that this species is the same as Acacia tenuijlora^ Willd., 

 there seems no reason why Poiret's Mimosa tenuijlora should not be 

 taken up for it upon grounds of priority, but on a comparison of an 

 authentic specimen of M. Cabrera, with Willdenow's original description 

 there appear to be several striking difierences rendering real identity 

 impossible. M. Cabrera is called by the Spanish Americans " carbon " 

 or " carbonal " and its wood is, ace. to Niederlein, used to make char- 

 coal. 



* * Flowers in globose, ovoid or (in M, monancistra) subcylindric heads. 



-1- Shrubs or trees with hard wood, rarely (in M. Lemmoni and M. Grahami) only 

 undershrubs : branchlets mostly armed with scattered or infra-stipular never 

 seriate spines : pubescence never strigose : corolla not striate. 



++ Pubescence not rufous : pods setose or spinose upon the valves. 



= Pod oblong or moniliform, not over 1 cm. broad. 



36. M. monancistra, Benth, Low shrub with flexuous grayish 

 often striate branchlets : internodes armed by a single short recurved 

 subaxillary spine (which is frequently some distance beneath the leaf 

 insertion) : pinnce 2 to 3 pairs ; leaflets mostly 4 pairs, oblong or ellipti- 

 cal, obtuse, 3 to 6 mm. long, appressed-pubescent : heads ovoid or short- 

 cylindric; flowers silky-tomentulose : pods 3 to 5 cm. long, acuminate, 

 3-7-jointed hispid with stramineous seta? or weak spines. — PI. Hartw. 12, 

 & Trans. Linn. Soc. xxx. 425: Wats. Proc. Am. Acad. xvii. 350. — W. 

 Texas, on the Rio Pecos, Havard, no. 66 ; Mexico, Tamaulipas, Berlan- 



VOL- xxxiii. — 21. 



