124 THE FLORA OF THE NOETHEEN TBREITOBY. 



Series IV. Calamiformes. — Phyllodia rarely none, more frequently narrow- 

 linear or subulate, terete tetragonous or very slightly flattened, articulate on 

 the stem, obtuse or with short innocuous or recurved points, 1 or several-nerved. 

 Flowers in globular heads on simple axillary peduncles, or rarely several heads 

 in a short raceme, or irregularly racemose by the abortion of the floral phyllodia. 



A. Plurinerves. — ^Phyllodia striate, with 2, 3 or more nerves on each side. — 

 10. A. Bynoeana. 



B. Uninerves. — Phyllodia 1-nerved or nerveless. — 30. A. juncifolia. 



Series V. Brunioidece. — Phyllodia numerous, small, Unear-subulate, 

 verticiUate, clustered or crowded, obtuse or with innocuous or rarely rigid 

 points. Flowers in globular heads or simple axillary peduncles, usually ex- 

 ceeding the phyllodia. 



Phyllodia aU regularly verticiUate. 



Phyllodia 8 to 10 or more in the whorl, slender, under |-in. long. 

 Petals striate. 

 Phyllodia recurved at the end, sulcate. Pod sessile. — 37. A. 



lycopodifolia. 

 PhyUodia recurved at the end, not sulcate. Pod on a stipes of 2 



to 3 Unes. — 21. A. galioides. 

 Phyllodia straight at the end, sulcate. Pod sessile. — 26. A. 

 hippuroides. 

 Phyllodia 5 to 7 in. the whorl, recurved at the end, not sulcate. 

 Petals not striate, with a prominent midrib. — 5. A. Baueri. 

 Phyllodia in clusters of about 3. Pod almost woody, narrowed into a long 

 stipes. — 65. A. subtemata. 



Series VI. Uninerves. — Phyllodia vertically flattened, either narrow and 

 obtuse or with a short oblique point, or broad and obtuse, acute or rarely 

 pungent-pointed, with 1 central nearly marginal nerve, or very rarely 2-nerved. 

 Flowers in globular heads, either on simple axillary peduncles, solitary, in 

 pairs or clusters, or several in axillary racemes. 



A. Armatce. — Shrubs or undershrubs, not spinescent. Phyllodia from 

 obovate to lanceolate, rarely above IJ in. long, more or less undulate, with a 

 central nerve and* usually nerve-Hke margins ; marginal glands none, or very 

 small and obscure. Stipules generally persistent, either spinescent or setaceous 

 or acuminate or phyllodia-like. Peduncles 1-headed. — 24. A. Gregorii. 



B. Brevifolice. — Shrubs, never spinescent. Phyllodia either broad, ovate 

 or falcate, or narrow, oblong or Unear, short, obtuse or with a small recurved 

 innocuous point, occasionally undulate and more pointed. Stipules minute 

 or none. Peduncles 1-headed. — 59. A. spathulata. 



C. Angustifolice. — Shrubs or trees, not spinescent. Phyllodia oblong- 

 lanceolate or linear, occasionally falcate, with one central nerve or rarely 2- 

 nerved, mostly above 1 in. long. Stipules minute or none, or rarely spinescent. 

 Peduncles 1-headed. Some of the species very resinuous. — 55. A. Sentis. 



D. EacemoscB. — Not spinescent. Phyllodia not pungent, with one central 

 nerve or very rarely a second shorter or fainter one, the veinlets when visible 

 diverging from the midrib or reticulate. Flower-heads globular, few or all or 

 nearly all in axillary racemes, very rarely a few solitary in the lower axils of a 

 young branch. Flowers usually small and 5-merous. Petals not striate. 



Phyllodia linear, thick, rarely falcate-lanceolate, usually without glands, 

 the lateral veins reticulate and obscure. Seeds longitudinal. — 54. A. salicina. 



Phyllodia ovate, obovate or broadly oblong, usually under 1 in. — 51. A. 

 pyrifolia. 



