"T 





BOTANY. 



85 



BC. Prodr. 5, p. 516: Ddess. Ic. ScL 4, t. 26. Coleto creek 



Rio Grande, Texas ; ScJiott. 



EERLA^'D^ERA LYRATA, Benili. PL Rarfw. p. 17. Cobre, Mimbres, Mule creek; etc , New 

 Mexico ; Bigelow, WiigJit, On the Rio Grande and in the Sierra Madre, Sonera ; Sclioti, etc. 



Engelmaxnia pixnatifidAj Torr. d: Gray. I.e. Rock creek^ Texas; Bigtloiv. On the Rio 

 GrandCj at Cleto creek; Sdiott. A marked variety of this, with single and larger heads, 

 emaller pappus, and less lobed leaves, was gathered by Tliurber at Ojo Caliente, Chihuahua. 



Melampcdiu3I cinereum, DC; Gray^ PI. Wrigld^ 1, lo. 103, & 2, p. 85, & var. RAMOSissLMU^r 

 (M. ramosissimum, DC.) Common in Texas and New Mexico. Very various forms occur in 

 Berlandier's collection, under Nos. 833, 2242, from San Fernando, Coahuila ; 1492, 1881, from 



Bexar ; and 607, 2017, from Laredo and the Nueces, 

 Mela.mfodium iiisPiDUM. H. B, K.: Grav. PL Writ 



S 



Santa Cruz, Sonera ; Wright. Accords well with Mexican specimens collected by Schaffner. 



Melampodium LOXGicoRNU, (Gray^ PL Thiirher^ p, 321) : annuura, hispidnlum, diffuse ramo- 

 sum ; foliis lanceolatis subintegerrimis; pedunculis alaribus filiformibus (|— 2 unc. longis) 

 raonocephalis ; involucri sq^uamis internis fructiferis 7-10 nervoso-striatis dorso vix muricatis 

 apice in cornu longissiraum extus sericeo-puberulum circinnatum productis ; ligulis aureis 

 oblongis. — Near Santa Cruz, Sonera; Tlmrhtr, Santa Magdalena, Sonora ; ScholL The pub- 

 lished character of this curious species is here somewhat amended, since Mr. Schott's specimens 

 (which are in good flower, while those of Mr. Thurber were in fruit) show conspicuous rays much 

 longer than the disk ; but they have the same long and silky horns. The leaves are not always 

 perfectly entire, nor all obtuse. 



DICRANOCARPUS, Nov. Gen. 



Capitulum pauciflorum ; floribus exterioribus 3-4 foemineis subradiatis, ligula minima 2-3- 

 loba, stylo breviore ; disci totidera sterilibusi, tube corollfe cylindrico, limbo cyathiformi 5-fido. 

 Involucrum 1-2-bracteolatura (bracteolis linearihus parvis), 3-4-phyllum : squamae oblongi^, 

 obtus<'^, merabranacea3, erectge, subplante, demum deciduce. Receptaculum planum: paleos 

 lineares parvfe inter flores. Antherte oblonga3, ecaudata3. Stylus fl. masc. inclusus, indivisus, 

 apice clavato-pubescens ; fl. foem. bifidus, rarais in ippendiculatis. Ovaria disci inania, epap- 

 posa. Achcnia (radii) difformis, nempe 1-2 linearia vel subulata, subteretia, l^evia, persis- 

 tentia, aristis 2 validis Ifevissimis divergentibus seu recurvis persistentibus cornuta; Ccctera 

 breviora et crassiora^ intus ^vepe tuberculato-rugosa, aristis brevioribus vel obsoletis. — Herba 

 annua^ gracilis, fere glabra, Heterospermi facie, microcephala ; foliis oppositis 3-5-sectis, sum- 

 misve integris, filiformibus; capitulis solitariis pedunculatis ; floribus flavis, 



DicRAXocAnrus pakviflorus, Grayj PL Thurhevj p. 322, adn. Hcterospermum dicranocar- 

 pum, Gray^ PL Wright^ 1, p. 109. Plains below San Carlos, Tamaulipas ; Parry. Only 

 mature achenia of this plant were known, from Wright's first collection, persisting on the 

 receptacle from which everything else had fallen. The flowers, etc., furnished by Dr. Parrv 

 enable us to complete the characters ; these show that the plant is by no means a Hcterosper- 

 mum, (although allied to that genus,) but a new generic type which, according to the classifi- 

 cation adopted, must be referred to the rather incongruous subtribe Melampodine^e. The 

 flowering heads are only a line and a half in length, and the scarcely explanate ray-corollas are 



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