THE FLORA OF THE NORTHERN TBRBITORY. 125 



Series VII. Plurinerves. — Phyllodia vertically flattened, obtuse or with 

 an innocuous or recurved point (rarely pungent when the phyllodium is broad), 

 with 2 or more longitudinal nerves. Flowers in globular heads on axillary 

 peduncles, either solitary or shortly racemose. 



A. Triangulares. — Stipules setaceous or minute, not spinescent. Phyllo- 

 dia small (under |-in. long), broadly falcate-ovate or triangular with small 

 points often pungent. 



Flowers not |-line long. Calyx much shorter than the corolla. — 16. A. 

 deltoidea. 



Flowers above 1 line long. Calyx nearly as long as the corolla. — 63. A. 

 stipulosa. 



B. Brevifolice. — Phyllodia under 1 in. long, obovate or broadly oblong, 

 very obtuse, often undulate. Stipules inconspicuous. 



Phyllodia under J-in. or very rarely |-in. long. Petals smooth. — 57. A. 

 setulifera. 



Phyllodia ^ to 1 in. long. Petals strongly striate. 



Phyllodia faintly nerved. Calyx shortly toothed. Pod thick and hard, 

 hooked at the end, tapering into a long stipes. — 67. A. translucens. 



Phyllodia several-nerved. Sepals spathulate, free or separating. Pod 

 thinly coriaceous, flat, with thickened parallel margins, glutinous and villous. — 

 9. A. impressa. 



C. Oligoneurce. — Phyllodia above |-in. and mostly above 1 in. long, 

 oblong lanceolate or linear, straight or scarcely falcate, with 2 or 3 nerves, 

 faintly or not at all veined between them (except A. Simsii), and not glutinous. 



Flower-heads racemose. Phyllodia coriaceous, obtuse. — 8. A. bivenosa. 

 Peduncles sohtary or clustered. — 58. A. Simsii. 



D. Microneura. — Glabrous or glaucous and not glutinous. Phyllodia 

 thick, veinless or with very fine, scarcely prominent parallel veins, narrow 

 or rarely short and obovate. 



Veins only visible under a lens (Western species). — 12. A. coriacea. 

 Veins very fine, but prominent (Eastern species). — 60. A. stenophylla. 



E. Nervosce. — Often viscid, occasionally glaucous, rarely hoary or pubes- 

 cent. Phyllodia straight or sometimes falcate, coriaceous or thin, with several 

 prominent nerves and, when broad, reticulate between them, the nerves rarely 

 reduced to three when the phyllodium is narrow. 



Glaucous. Phyllodia coriaceous, oblong, cuneate, obtuse ; nerves 3 to 5, 

 slightly prominent, veins reticulate. — 25. A. hemignosta. 



Very viscid. Nerves or veins usually numerous. — 16. A. dictyophleba. 



F. Dimidiaice. — Phyllodia, usually broad, and often long, falcate or very 

 oblique, with 2, 3, or 4 prominent distant nerves, and reticulately penni-veined 

 between them. 



Glabrous. Phyllodia rather thin (2 to 4 in.). Flower-heads in axillary 

 racemes growing out into leafy branches. Pod 6 to 8 Unes broad. — 7. A. 

 binervata. 



Glabrous. Phyllodia coriaceous, long-falcate (6 to 8 in.). Flower-heads 

 in axillary clusters or very short racemes. — A. latescens. 



Hoary or glaucous. Phyllodia large, broad (3 to 4 in.). Pod above 1 in. 

 broad. — 56. A. sericata. 



Woolly or velvety-tomentose. Phyllodia obovate or orbicular ( 1 ^ to 2 in. ). 

 Flower-heads in a terminal raceme. — 53. A. retivenia. 



