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BOTANY. 



181 



Yorticillate liairs, but is nearly smootli later in the season. The staminodia are merely obtuse 

 lobes between the filaments, or are wanting altogether. According to Mr. Schott the Mexicans 



use a decoction of this plant as tea. 



Alternanthera? suFrRUTicosA (n.sp.): cinereo-pubescens; caule suffruticosaerecto? ramosissimo; 



foliis inferioribus ovatis breviter petiolatis, superioribus verticillatis subternatls snborbiculatis 



sessilibus ; glomerulis paucifloris axillaribus sessilibus; sepalisoblongo-lanceolatis versus apicem 

 pilosis bracteis duplo longioribus. Mountains near Frontera and between the Pecos and the 

 Limpio ; Wright^ No. 592 and 1757. This species is truly suffruticose; the stems (which seem to 

 grow erect,) arise from a thick irregular woody base. The A. lanuginosa is always annual and 

 diffuse ; the leaves are larger, with along abruptly attenuated base, and the glomerules are fewer 

 flowered. 



GoMPHRENA TUBEEirERA (n. sp.:) parce pilosa ; radice tube'rosa ; caule erecto ramoso herbaceo ; 

 foliis lanceolato-linearibus sessilibus integerrimis mucronulatis cinereis ; pedunculis elongatis 

 simplicibus ; capitulis globosis vel ovatis solitariis plerumque diphyllis ; floribus nitidulis albo- 

 roseis; calyce bracteis lateralibus sub^quali; sepalis acutissimis uninerviis villosissimis. Rocky 

 banks of the San Pedro and other tributaries of the Rio Grande, Western Texas and in New 

 Mexico. (Nos. 593 and 1750, Wright.) Root fusiform, 1^-2 inches long and about one-third of 

 an inch in diameter above, fleshy and farinaceous ; stem 1-2 feet high, sparingly branched, 



GoMPHRENA DECUMBENS, Jacq ; Moq. I, c. p. 410. Lower Rio Grande, October ; Schott. This 

 ; agrees very well with specimens from Havana, named by Moquin. 



GoMPHRENA GLOBOSA I var. ALEIFLORA, Moq. L c. Ou the Cibola and other tributaries of the 

 * Bio Grande; BigeloWy Schott. Santa Cruz and Babocomori, Sonora, September; Thurher. (No. 



1751, Wright.) 



GoMPHRENA Sonora (n. sp.:) caulibus e basi lignosa ortis pilosis ; foliis lanceolatis sessilibus 

 pilosis pallide viridibus ; capitulis terminalibus et lateralibus ovatis simplicibus vel 2-3 conflu- 

 entibus 2-4-phyllis ; floribus flavescenti-vel carneo-albidis ; bracteis lateralibus dorso sursum 

 angusto-cristatis calyce pauUo longioribus, sepalis acutissimis uninerviis villosissimis ; stylo 

 ovario longitudine apice bifido. Mountains near Santa Cruz, Sonora^ Mexico, September; 

 Wright^ (No. 1749,) Thurher. Stems simple or sparingly branched, slender, 1-2 feet high, 



sparingly clothed with appressed hairs. Leaves 1-1^ inch long, 3-5 lines wide, acute, the 



lower ones narrowed at the base. Axillary heads simple, sessile, about one third of an inch in 

 diameter ; terminal heads mostly composed of two or three closely aggregated smaller heads. 

 Lateral bracts about one-fifth longer than the calyx, with a narrow serrated crest above the 

 middle, Stamineal tube entire to the summit ; antheriferous lobes very minute; the lateral ones 

 liguliform, much shorter than the anthers. Style about as long as the ovary; stigmas cylindrical, 

 acute, half as long as the style. This species occurs only in the collections of Wright andThur- 

 ber, and does not appear to have been hitherto described. It seems to be allied to G, agrestis, 



Mart. 



GoMPHKENA c^PiTOSA (u. sp.i) humilis ; caulibus c^spitosis ; caudice Hgnoso ; foliis obovatis 



obtusis subsericeo-villosis, radicalibus basi attenuatis, caulinis binis subsessilibus ; pedunculis 

 brevibus simplicibus ; capitulis terminalibus solitariis ovatis ; floribus nitidis flavescenti-albis ; 



calyce bracteis ecristulatis paullo longiore; sepalis obtusiusculis uninerviis villosissimis. Grav- 

 elly plains near the Organ mountains, New Mexico ; also at the Copper Mines and near Mimbres, 

 April— May ; Bigdoio, Wright, (No. 1572.) Cook's Springs, New Mexico ; Thurher. Rio de 

 Santa Cruz, &c., Sonora ; Schott ^ Capt. E, K. Smith .No. 1753, Wright, is a glabrescent state 

 of this species. Stem or rather caudex 1-2 inches long, thick and somewhat ligneous, throwing 



