MARCH, igoo. PLANTVE UTOWAN^E MILLSPAUGH. 39 



is seen in (i) the great reduction in size of the plant and all its 

 parts accompanied by the dense prostrate habit, (2) the disappear- 

 ance of two or three stamens indicated by the sterile filaments which 

 are found standing in the position of the fertile stamens with reference 

 to the perianth segments. 



In the light of the above considerations the following revision of 

 Kuntze's arrangement of the Gomphreneae is suggested, to the 

 extent that it is affected by the changes here presented: 



A. Genera characterized by solitary or fasciculate flowers, 

 Guillemenia, Cledothrix. 



B. Flowers capitate or spicate. 



a. Perianth segments+coalescent, Froelichia. 



b. Perianth segments free. 



a. Stigma capitate, Pfaffia, Gossypianthus, Alternanthera. 

 ft. Style (i or 2) bifid. 



Fls. 4-merous, stamen i, Woehleria. 

 Fls. 5-merous, stamens 2-5. 

 Lvs. Alternate, Dicraurus. 

 Lvs. Opposite. 



Stamineal tube lo-fid, i. e. , 5 fertile stamens with 

 staminodia alternating, these sometimes much reduced, 

 Iresine. 



Stamineal tube 5-fid, laeineae all antheriferous or a 

 part abortive. 



Laeineae trifid, fimbriate or denticulate Gomphrena. 

 Laciniae simple, Lithophila. 



The genus falls into two sections as follows: 



Sect. Philoxerus. Plant erect and robust; stamens 5. 



Sect. Eulithophila. Plant depauperate, stamens 2 or 3. 



Lithophila vermiculata (Linn.) Uline Comb. nov. 



Gomphrena vermicularis Linn. Sp. PI. 224. 



Sandy bare spots in fields at Santurce (270) and Catano (327), 

 Porto Rico. Dry creek bed near Charlotte Amalia, St. Thomas (452), 

 where it is known as the "Bay-flower." Ratones Island (650). Shores 

 of the bay of Santiago de Cuba (1018). South shore of Cayman Brae 

 (1220), and shores of the lagoon near Progreso, Yucatan (1712). On a 

 small bare sandy spot on Perez Island of the Alacran Shoals (1741), 

 not on the other islands of the group. 



IRESINE LANCEOLATA Moq. in de C. Prod. 13: 347. 



Among the bushes above the beach at Cape Corientes, Cuba 

 (1458 <J), and in the arid stony scrubland south of Progreso, Yuca- 

 tan (1659 $ ). 



The Yucatan $ specimen differs from that of Cuba $ only in 

 having its leaves more crowded and red-margined and somewhat nar- 

 rower and smaller; they are without doubt very closely related, and 

 are both probably only varieties of the variable Iresine paniculata. 



IRESINE PANICULATA (Linn.) Kuntze Rev. Gen. 542. 

 Celosia paniculata Linn. Sp. PI. 206. 

 Iresine celosioidcs Linn. Sp. PI. ed. 2: 1456. 



