The whorls are posteriorly gibbose or tumid at the sutures, and the callus is less spreading than in others of the genus.    From Wordnik.com.  [Explorations in Australia The Journals of John McDouall Stuart] Reference

Page view page image: long, and one 1/8 of an inch wide, it is obtuse, absolutely entire, veinless fleshy and gibbose; has no perceptable taste or smell, and no anamal appears to eat it by way of designating when I mention it hereafter I shall call it the fleshey leafed thorn. 1.    From Wordnik.com.  [Original journals of the Lewis and Clark Expedition, 1804-1806] Reference

3/4 or an inch long, and one 1/8 of an inch wide, it is obtuse, absolutely entire, veinless fleshy and gibbose; has no perceptable taste or smell, and no anamal appears to eat it. by way of designating when I mention it hereafter I shall call it the fleshey leafed thorn.    From Wordnik.com.  [The Journals of Lewis and Clark, 1804-1806] Reference

Glumae: 2 exteriores, gibbose naviculares, acutae, muticse, carina ciliatae: 1 interior, folliculiformis, ellipticus, genitalia includens, laevis.    From Wordnik.com.  [Prodromus stirpium in horto ad Chapel Allerton vigentium] Reference