18 PROCEEDINGS OF THE AMERICAN ACADEMY 



that of the orighial specimen was probably from discoloration. — To 

 Mr. Jones we are likewise indebted for the following addition to the 

 Calliachyris group of the CaUlylossa section. 



Layia Jonksii. L. Fremonti peraffinis, parce hispidula, viscida, 

 superne glandulis parvis stipitatis parce coiispersa; foliis pinuatilidis 

 vel superioribus tridentatis nunc integerrimis ; ligulis breviusculis ; 

 bracteis reeeptaculi tantum ad margiuem ; pappo e paleis ovatis seu 

 ovato-oblongis acuminato-acutatis erosulo-denticulatis nudis coroUte 

 tubo baud longioribus. — California, near San Luis Obispo, M. E. 

 Jones. — Forms like these, distinguished almost wholly by the pappus, 

 have to be noticed and characterized ; but they weaken the value of 

 the species in this genus. 



HelenioidecE. 



Clappia su^d.efoi.ia. Gray in Bot. Mex. Bound. 93. This has 

 been rediscovered by Dr. llavard, U. S. A., on the alkaline flats to- 

 ward the mouth of the Pecos River, in the southwestern part of 

 Texas. A good specimen received from him shows that the j)lant is 

 an undershrub ; that the linear leaves are so fleshy as to be terete, and 

 are neither punctate nor at all glandular; so that the genus must be 

 excluded from the TagetinecE. It may rest in the somewhat artificial 

 subtribe Jaumlece of Bentham and Hooker. But the genus consists 

 solely of the original species, which, considering the state of the mate- 

 rials, has been well figured by Bentham in the Icones Plantarum, t. 1 105. 

 The supposed second species, C. aurantiaca, Benth. Ic. PL t. 1104, 

 is very different, and if not Dysodia appendiculata, Lag., with the oil- 

 glands overlooked or wanting in the specimen, must be very nearly 

 related to that species. 



Lapiiamia and Perittle. A new study of all the species con- 

 firms our conclusion (in Proc. Am. Acad. ix. 194), that these nearly 

 related genera should be preserved with their original limitation, 

 rather than that suggested by Bentham in the Genera Plantarum. 

 The pappus gives better characters than the style-appendages, and 

 there is no good distinction to be found in the involucre. 



Laphamia divides into three sections: — 1. Pappothrix, for L. 

 rupestris and L. cinerea. 2. True Laphamia, for L. Lemmoni and 

 its var. pedata, L. /lalimiftdia, L. anyuslifoUa and its var. laciniata, 

 L. Pahneri, with flowers said to be '' creamy-white," L. meyacephala^ 

 Watson, and L. Stansburii. 3. Ditiirix, with a pair of stouter naked 

 bristles, one from each angle of the akene, and the head only 6-8- 

 flowered, L. bisetosa, Torr. 



