180 UNITED STATES AND MEXICAN BOUNDARY. 
state from Key West, collected by Mr. Blodgett, and from the vicinity of New Orleans, where 
it was found by Dr. Riddell. Even some of Berlandier's specimens, which Moquin referred to 
Scleropus, are in the ordinary state of Amblogyna polygonoides. 
MONTELIA TAMARISCINA, Gray, Man. Bot. ed. 2, p. 370. Amarantus tamariscinus, Nutt. in 
Trans. Amer. Phil. Soc. (n ser.) 5, p. 165. Ravines Rio San Pedro, western Texas, Septem- 
ber ; Bigelow, who collected only the male plant ; while Wright (under No. 1747) has both sexes. 
GUILLEMINEA DENSA, Mog. l. с. p. 338. Plains between the Limpio and the Rio Grande; also 
near the Copper Mines, July—August; Bigelow. Sonora; Thurber. On the banks of the 
Colorado, California ; Schott. (Nos. 584, 585, and 1755, Wright. ) Mr. Thurber’s plant exactly 
accords with the Жырда оЁ Moquin, 1%. ; but our specimens from the other collections һауе 
broader leaves. 
GOSSIPIANTHUS RIGIDIFLORUS, Hook. Ic. Pl. 3, t. 251; Mog. 1. с. p. 337. Western Texas. 
(Wright, Nos. 586 and 1754.) This plant occurs only in the collections of Mr. Wright. It is 
certainly the same as Drummond’s, on which the species was founded. We have no original 
specimens of G. tenuiflorus for comparison, but we believe that it is not distinct from G. rigidiflorus. 
In our Drummondian specimens of the latter, the plant is in fruit and the stamens are withered. 
In the more complete ones of Mr. Wright the filaments are ovate-lavceolate, as they are described 
in G. tenuiflorus; and in both they are connate at the base. The relative length of the bracts 
and calyx depends on the age of the flower. 
TRESINE VERMICULARIS, Mog. l. c. p. 340. Ilecebrum vermiculatum, Linn. Lower Rio Grande, 
in alluvial soils, October, Schott. 
IRESINE DIFFUSA, Humb. & Bonpl. in Willd. Sp. 4, p. 165 ; Moq. l. c. 8 345, Var. foliis ovato- 
oblongis; spiculis oblongis; calyce bracteis subduplo longiore'; st ubulatis staminibus 
alternantibus et triplo-brevioribus. Sonora and Chihuahua; Thurber. San Estaban, Septem- 
ber; Bigelow. On the Rio Grande, near the Great Сайоп; Parry. Perhaps not distinct from 
1. celosioides, to which, indeed, some other species of the section Iresinastrum might be referred ; 
but we have not found staminodia in any other of this group. 
All our specimens are female. No. 589, Wright, is the male plant, in which there are small 
subulate staminodia between the filaments ; thus resembling Ireneis, of Moquin, a genus scarcely 
distinct from Iresine. 
ALTERNANTHERA ACHYRANTHA, R. Br. Prodr. р. 417; Mog. l.c. p. 358. Achyranthes repens, 
Linn. ; ЕП. Sk. 1, p. 309. Banks of the Rio Pecos; Schott. Bachimba, Chihuahua; Thurber. 
Май; ; Gregg. Moquin refers Elliott's plant to Telanthera polygonoides, but it certainly 
belongs here. 
ALTERNANTHERA LANUGINOSA, Torr. in Emory Rep. р. 150; Mog. 1. с. р. 359, (pro parte.) 
Achyranthes lanuginosa, Nutt. in Amer. Phil. Trans. (n. ser.) b, p. 166. Common in New 
Mexico and Sonora, flowering through the summer. (Nos. 591 and 1756, Wright; Nos. 726: 
and 727, Fendler ‚ Nos. 835 and 2255, Berlandier.) In Emory’s Report I noticed a remarkable 
character in the specimens examined. The flowers become imbedded in the branches on which 
they grow, so that when in fruit they are partly or wholly concealed ; on which account I pro- 
posed to call it Endotheca. This character is, however, not constant, or is only seen in old 
specimens. Somctimes the short branches, with the cluster of flowers at the summit subtended 
by two or three leaves, will assume the appearance of a pedunculate head, furnished with an 
involucre. The peduncle becomes thickened upward, as does likewise the confluent bases of the 
leaves, involving more or less the flowers. In the young state the plant is densely woolly with 
кенет ыс HR ST 
