174 UNITED STATES AND MEXICAN BOUNDARY. 
tuberculate fruit, is only a similar state of O. glabrifolius. The 3-flowered species occasionally 
bear four or five flowers. | 
Our species are exceedingly variable, and hard to fix by characters. The tubercles or papille 
develope variously in the same species, and they also change after wetting, deliquescing more 
or less into mucilage. The earlier flowers of O. nyctagineus, and ا‎ of other s 
are apt to fructify precociously. 
I can understand our species only as follows: 
$ 1. Perigonium breve, subcampanulatum seu rotato- infundibuliforme, involucrum paullo 
superans. | 
` * Anthocarpium glabrum secus vel etiam inter costas sepissime tuberculatum, | Involucrum 
1-3-florum. 
O. viscosus et O. GLABRIFOLIUS, Mexico. 
О. GLABRIFOLIUS, Vahl.: var. involucro 2-3-flor Texas, in mountain valleys near the Rio 
Grande, below El Paso; No. 605, Wright. 
° O. AGGREGATUS, Vahl. Mirabilis aggregata, Cav. Ic. Б і. 437. Smith's Run, western Texas ; 
No. TTIT, Wright. Certainly the plant of Cavanilles, and found north of Mexico by no other 
collector. ,- 
жж Anthocarpium pubescens. Involucrum semper 3—5-florum. 
O. NYCTAGINEUS, Sweet. Allionia nyctaginea, Micha. Fi. 1, р. 100. Folia omnia (nisi summa 
diminuta) petiolata, basi obtusa vel cordata. Fructus hirsutulus, inter costas nunc leviter 
subreticulato-rugosus. 
Var. z LATIFOLIUS: usque ad involucrum fere glaber seu glaberrimus; foliis ovatis cordatisve 
submembranaceis, facie Mirabilis. Allionia nyctaginea, Micha. Wisconsin to Texas and New 
Mexico. No. 741, Fendler ; 603, Wright; 681, (1847-8,) Lindheimer, &c. This needs to be 
compared with O. violaceus, a Linnzan species, of which I have no sufficient specimens. 
Var. 8 CERVANTESII: ramulis involucrisque viscoso-pubescentibus seu villosis ; foliis plurisque 
minoribus et crassioribus sz[ius obtusis cordatis vel basi subcordatis. O. Cervantesii, Lag. ex 
Choisy, l. c. New Mexico and Texas to Mexico. No. 912, Coulter; 142, Fendler ; 1719 and 
1720, Wright. No. 1719, in part, and 1721, Wright, an intermediate between a and f8. 
Var. у oBLoNGrFOLIUs: foliis ovato-lanceolatis oblongisve crassis basi haud cordatis; cet. 
var. 8. АШоша ovata, Pursh, Fl. 1, p. 97. Oxybaphus floribundus, Choisy, l: с. A mere 
form of the last. No. 604, Wright ; 2004, Berlandier, &c. 
Var. e PILOSUS: undique viscoso-hirsutus ; cet. var. 8 & y. Calymenia pilosa, Nutt. Gen. 
1, p. 26. Upper Missouri to New Mexico. No. . 1718, Wright ; between this and var. |. Rio 
Minibres, «с. ; Bigelow. ` 
О. ALBIDUS, Sweet; Choisy, 1. c. Allionia albida, Walt. Fl. Car. p. 84. Calymenia albida, 
Nutt. Оху». pilosa? Engelm. & Gray, Pl. Lindh. l. c. р. 51. Preter inflorescentia glabella. 
Folia omnia subsessilia, lanceolata seu oblongo-lanceolata, basi acuta. Fructus magis hirsutus 
quam in O. nyctagineo, secus vel inter costas muriculatus. North Carolina to Texas. Hook. 
Fl. Bot. Am. 2, р. 124. 
O. HIRSUTUS, Sweet ; Choisy, 1. c. Allionia hirsuta, Pursh, Fl. 2, p. 728. Calymenia’ hirsuta, 
Nutt. 1. с. Saskatchewan to northwestern Texas ; on the Limpio ; Bigelow, Wright. Subpedalis, 
undique hirsutus. Folia lanceolata, crassa, анына breviter petiolata. Fructus O. nyctaginei. 
小 he broader-leaved states approach svar, é of O. nyctagineus ; ; the narrow ones ju espa 
glabrate may pass into the next species. 
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