70 



PLA^T^T. WRIGHTIAN^. 



YI 



Mountain yalleys, between the San Pedro and Santa Cruz, Sonora ; Sept. 

 ^1127.) — Stems 1 to 3 inches long, in the cultivated plant longer and more pro- 

 cumbent, slcndcr. Lcaves 12 to 18 lines long, li to 2 lines wide, rather fleshy. 

 reduncles 4 to 6 inches long, the earliest scapiform, naked or with a few minute 

 bractlets. Scales of the campanulate involucre 3 lines long, linear, rather pbtuse, 

 bearing usually only a single gland. Ligules 12 or 13, oblong. Disk-flowers 40 

 or more. Achenia puberulent. Pappus in the ray of t^vo slender awns, or stout 

 bristles, as long as the tube of the ligule, not scarious-dilated at the base, minutely 

 scabrous ; in the disk of 30 or 40 capillary and very unequal scabrous bristles ; the 

 longer ones little shorter than the corolla. 



P. i^tBEiiBis (sp. nov.) : glaberrima, ultrapedalis ; caulibus e radice perenni pluri- 

 mis erectis gracilibus rigidis angulatis apice paniculato-cymosis polycephalis ; foliis 

 anguste linearibus secus margines parce nigro-glandulosis haud setigeris ; capitulis 

 pedicellatis ; involucri squamis 5 linearibus obtusis glandulis nigris oblongis linea- 

 ribusve parce notatis ; ligulis 5 oblongis ; fl. disci 5 - 7 ; acheniis hirtellis ; pappo 

 conformi e paleis 2-5 incequalibus ssepius dimidiato. — On tlie Sonoita, near De- 

 sertcd Eancho, Sonora ; Sept. (1399.) — This singular species, with the char- 

 acters otherwise of a genuine Pectis, is remarkable for the total absence of cilia 

 fringing the base of the leaves, as well as for its size ; the stems being a foot 

 or more in height. The root is rather ligneous. The leaves are l^ to 2 inclies 

 long, only a line wide, and perfectly entire. Peduncles an inch or less in length, 

 sparingly and minutely bractcolate. Involucre 4 lines long ; the scales conduplicate 

 arouud the ray-achenia. Ligules 3 lines long, yellow, changing, as do also the 

 disk-flowers, to red or purple. Disk-corollas slightly bilabiate, the teeth each 

 dotted with a dark gland. Pappus nearly alike in the disk and ray, mostly of 

 about 5 lanceolate paleae, three of which are minute, and two half the length of 

 the disk-corolla, or in the central achenia all small and neaiiy equal; in the exterior 

 achenia more or less unilateral. 



TrichocoPwOnis ritularis, Gray^ Tl, Fendl. p. QQ. In Piedra Pinta Creek 

 Wes tern Texas ; May. (1128) 



CcELESTiNA AGERAToiDEs, II, B. K. ; DC. Prodv. 5. p. 108. Creviccs of rocks 

 Guadalupe Pass, between the San Pedro, Sonora, and the copper miues; Oct 

 (1129.) 



Stevia macella' (sp. nov.) : annua, subpedalis, viscoso-pubens ; foliis tenui- 

 membranaceis giabellis ovatis grosse dentatis triplinerviis basi acutis in petiolum 

 marginatum decurrentibus, superioribus alternis ; capitulis paniculatis breviter pedi- 

 cellatis ; involucri squamis acutis ; pappo paleaceo brevissimo subcoroniformi floris 

 unici exaristato cset. aristis 3 corolla sublongioribus. — On shaded rocky clifl^s of 

 Coppermine Creek, New Mexico; Oct. (1130.) — Stem slender, erect, with short 

 paniculate iiowering branches. Leaves very thin and membranaceous, about an 

 inch and a half long, and an inch wide, all more or less cuneate at the base, on 

 slender margincd petioles ; the lower only opposite. Heads rather numerous in 

 terminal and latcral short corymbose panicles, longer than the pedicels. Involucre 

 3 lines long, viscous-pubescent. Corolla 2 lines long, whitish. Awns of the pap- 



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