250 Mr. D. Don's Descriptions of new Genera and Species 



Cacalia spathulata. Herb. S. et M. 

 In Mexico. Sesse et Mociniio. V . 



Herba caespitosa. Folia plurima, radicalia, petiolata, lanceolato- 

 spathulata aut elliptico-oblonga, membranacea, denticu- 

 lata, supra demiim calva, viridia, subtiis niveo-lanata, mol- 

 lissima, 2 — 3-pollicaria, basi attenuata ; juniora margine 

 revoluta. Petioli lineares, plani, membranaceo-alati, pol- 

 licares v. bipollicares. Scapi cubitales, subsolitarii, filifor- 

 mes, uniflori, squamis destituti, undique lanuginosi. Flos 

 nutans. Livolucrum polyphyllum : squamis triplici circiter 

 serie imbricatis, lanceolatis, acuminatis, coriaceis, lanugi- 

 nosis. Receptaciilum nudum. Flosculi disci copiosissimi, 

 masculi, tubulosi, 5-fidJ, longitudine unguiculares, nervis 

 ad sinum divisis, fauce parilm dilatat^ : laciniis lingulatis, 

 apice nervis marginalibus validis confluentibus incrassatis, 

 obtusis, nervis secundariis recurrentibus ad basin lacinia- 

 rum usque manifestis ! periphcerici foeminei, pauci, simplici 

 ordine digesti, uniformes, tenuissimfe filiformes, bilabiati, 

 non radiati, fauce coarctati: labiis minutis; interiore bifido, 

 laciniis linearibus, revolutis ; eateriore ligulam abbrevia- 

 tam, linearem, obtuse tridentatam constituente. Antherce 

 basi bisetae (setis ineequalibus cuspidatis) appendiculd line- 

 ari-ligulat^, obtusa, cartilaginea coronatae. Stigma mas- 

 culis bilobum, lobis brevibus, crassis, obtusissimis, minute 

 papillosis ; foemineis long^ exsertum, bipartitum : laciniis 

 semicylindricis, obtusis, laevibus, recurvis. Achenia fusi- 

 formia, compressa, pilosiuscula, apice tant^m angustata : 

 disco epigyno dilatato. Pappus capillaris, fulvellus, nee 

 stipitatus : radiis inaequalibus, minute denticulatis, duplici 

 ordine copiosissimis. 



This interesting genus is also allied to the Inulea. and Ci- 



choracece. 



