174 UNITED STA.TES AND MEXICAN BOUNDARY. 



tu"berculate fruity is only a similar state of 0. glabrifolius. The 3-flowered species occasionally 

 bear four or five flowers. 



Our species are exceedingly variable, and bard to fix by characters. The tubercles or papillae 

 develope variously in the same species^ and they also change after wetting, deliquescing more 



;. The earlier flowers of 0, nyctagineuS;, and probably of other species,, 



mucilag 



are apt to fructify precociously, 



I can understand our species only as follows : 

 1, Perigonium breve, subcampanulatum ) 



involucrum paullo 



superans. 



* Anthocarpium glabrum secus vel etiam inter costas sa^pissime tuberculatum, Involucrum 

 1-3-florum. 



0. viscosus et 0. glabrifolius, Mexico. 



0, GLABRIFOLIUS, VahLi var. involucro 2-3-flora. Texas, in mountain valleys near the Rio 

 Grande, below El Paso ; No. 605, Wright, 



0. AGGREGATus, Volil. MirabiUs aggregata, Cav. Ic. 5", t. 437. Smith's Run, western Texas ; 

 No. 1717, Wright. Certainly the plant of Cavanilles, and found north of Mexico by no other 



collector, 



** Anthocarpium pubescens, Involucrum semper 3-5-florum. 



0. NYCTAGINEUS, Sivcet. AlHonia nyctaginea, Michx. FL 1, p. 100. Folia omnia (nisi summa 



diminuta) petiolata, basi obtusa vel cordata. Fructus hirsntulus, inter costas nunc leviter 



subreticulato-rugosus. 



Var. a latifolius : usque ad involucrum fere glaber sen glaberrimus ; foliis ovatis cordatisve 

 submembranaceis, facie Mirabilis. AUionia nyctaginea, Michx. Wisconsin to Texas and New 

 Mexico. No. 741, Fendler ; G03, Wright; 681, (1847-8,) Lindheimer, &c. This needs to be 

 compared with 0. violaceus, a Linntean species, of which I have no sufficient specimens. 



Var. /5 CERVANTEsn: ramulis involucrisque viscoso-pubescentibus sen villosis ; foliis plurisque 

 minoribus et crassioribus sfcjius obtusis cordatis vel basi subcordatis. 0. Cervantesii, Lag. ex 

 Choisyy I. c. New Mexico and Texas to Mexico. No. 912, Coulter ; 742, Fendler ; 1719 and 

 1720, Wright. No. 1719, in part, and 1721, Wright^ an intermediate between a and ^. 



Var. Y oblongifolius : foliis ovato-lanceolatis oblongisve crassis basi baud cordatis ; c^et. 



var. 3. 



i 



Fl 1, ». 97 



Choisv, L c. A mere 



form of the last. No. 604, Wright; 2004, Berlandiery &c. 



Var. £ pilosus : undique viscoso-hirsutus \ cfet. var. ^ & y. Calymenia pilosa, Nutt. Gen. 

 l,p. 26. Upper Missouri to New Mexico. No. 1718, Wright; between this and var. ^. Rio 



Mimbres, &c. ; Bigelow. 



0. ALBiDUS, Sioeet; Choisy^ I. c. Allionia albida, Walt, Fl. Car. p. 84. Calymenia albida^ 



Nutt, Osyb. pilosa? Fngeh 



Lindh. I. c, p. 51. Prseter inflorescentia glabella. 



Folia omnia subsessilia, lanceolata sen oblongo-lanceolata, basi acuta. Fructus magis hirsutus 

 quam in 0. nyctagineo, secus vel inter costas 

 Fl. Bot. Am. 2, v. 124. 



muriculatus. North Carolina to Texas. Hooh 



Sweet ; Choisy 



Nutt 



L c. Allionia hirsuta, Pursh^ FL 2,p, 728. Calymenia hirsuta, 

 )rthwestern Texas ; on the Limpio ; Bigeloiv^ Wright. Subpedalis, 

 undique hirsutus. Folia lanceolata, cr'assa, inferiora breviter petiolata. Fructus 0. nyctaginei. 

 The broader-leaved states approach var. e of 0. nyctagineus ; the narrow ones becoming 

 glabrate may pass into the next sj^ecies. 



