Ie. Glumes membranaceous, the sterile lemma like the glumes in texture, fertile lemma and palea indurate or at least firmer than the glumes.................Tribe XII Paniceae Cenchrus Digitaria Panicum Paspalum Rhynchelytrum Setaria Stenotaphrum 3. Cyperaceae A. Flowers all uniform, spikelets uniform......B B. Scales of the spikelet strickly 2-ranked, conduplicate and keeled, inflorescence terminal umbels, flowers without perianth Lantana camara L. 39. Zygophyllaceae Tribulus cistoides L. Leaves in pairs, each with about 6 pair leaflets, flowers yellow, five petals, 10 stamens; seed in fruit with two very stiff spines. 40. 41. Cruciferae A. Pods short and pouchlike Cauline leaves clasping the stem Stamens 2 Lepidium Cauline leaves not clasping the stem Lobularia AA. Pods elongate Flowers yellow----Brassica Leaves lobed Flowers white.......Coronopus Leaves once or twice pinnately divided.