OF MARINE COASTS. 83 



Astragalus arenarius L. Pall. 



Low perennial with creeping rootstock, prostrate stems, branching 

 at base, 5 — 15 cm. long, hairy; leaves pinnate; leaflets linear-lanceolate, 

 flowers bluish-purple. 



Has a wide range on coastal sands of Europe, Asia, and North 

 America, but does not extend to the Arctic or to the tropics. Some- 

 times also on inland sand formations in Europe. 



A. Menziesii Gray. 



Perennial, stout,,, erect, 6 — 12 dm. high; young herbage whitish 

 pubescent, soon green, but hirsute-pubescent; leaflets many, commonly 

 crowded on the rachis, broadly oblong, usually retuse at apex, 10 — 15 

 mm. long, stipules broad, not pointed; corolla yellowish- white, with 

 purple-tipped keel ; pod 2 — 4 cm. long, thin-walled, much inflated, ovoid. 



Coastal sands of California. 



Canavalia obtusifolia DC. 



Perennial herb, with trailing stems, glabrous; leaflets broadly obo- 

 vate, obtuse, 5 — 7 cm. long, thick; flowers pink. 



Common on coastal sands in the tropics of South America, Africa, 

 Asia, and Australia. At Moreton Bay in Queensland. 



Crotalaria Cunninghamii R, Br. 



Shrub, 6 — 10 dm. high, terete, tomentose branches; leaves ovate, 

 broad, obtuse, 3 — 18 cm. long, densely tomentose on both sides, petiole 

 1 — 2 cm. long, geniculate above middle; stipules and bracts subulate; 

 flowers large, yellow-green, streaked with dark lines. 



Sandy shores of North, South, and West Australia. 



OastroloMum spinosum Benth. 



Shrub, 6 — 8 dm. high, mostly glabrous, but sometimes the young 

 shoots are clothed with evanescent wool; leaves opposite, ovate-cordate, 

 ending in a pungent point, and bordered with prickly teeth, 2 — 4 cm. 

 long and just as broad, rigidly coriaceous, usually glaucous. 



Together with several other species of the same genus common on 

 dunes near Fremantle, West Australia. 



Genista monosperma Lam. 

 Common shrub in the Mediterranean countries on sand, but is not 

 confined to sea coasts. Is often planted on dunes as an effective sand 

 stay. 



