196 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 13 



and by the small flowers with relatively wide linear perianth segments. 

 These characters together with the open paniculate inflorescence place 

 it in the section Sisalanae of Trelease or Rigidae of Berger. It is ap- 

 parently related to Agave nivea Trel., from which it differs by its flat 

 and shorter leaves, the unraised bases of the prickles, and the straight de- 

 current terminal spines. Agave Seemanniana Jacobi, known from Guate- 

 mala and Nicaragua, is to be expected in Costa Rica also. 



Orchidaceae 



Brassavola NODOSA LindL, Gen. & Sp. Orch. 114. 



Golfo de Dulce, March 26, Elmore F26, on trees in jungle. 



Widely distributed in the American tropics from southern Mexico to 

 South America and the West Indies. It blooms in the spring dry season, 

 having relatively inconspicuous greenish flowers tinged with purple. 



Laelia TiBiciNis (Batem) L. O. Wms. 



Port Parker, Salinas Bay, March 24, Elmore E19, a shaded epiphyte 

 high on a tree, elev. 175 feet. Petals pale lavender to a dark lavender 

 red with yellow markings on the upper petal. 



This is a first record of the species from Costa Rica. 



LORANTHACEAE 



Phoradendron quadrangulare (HBK.) Krug.&Urb.jBot.Jahrb. 

 24:35. 1818. 



Port Parker, Salinas Bay, March 24, Elmore E17^ growing on Byr- 

 sontma crassifolia. 



Widely distributed from southern Mexico to South America and the 

 West Indies, growing mostly on broad-leaved trees in middle and lower 

 elevations. Trelease recognized six or eight closely related species that 

 Standley and Steyermark (Fl. Guata., Fieldiana Botany 24:73. 1946) 

 relegated to synonomy under the above name. 



Amaranthaceae 



Alternanthera laguroides Standi, in Standi. & Cald., Lista PI. 

 Salvador 74. 1925. 



Golfo de Dulce, March 26, Elmore F13, sandy soil of clearing in 

 jungle near sea level. Vine with white flowers. 



Clearings and thickets of the Pacific slope from Guatemala to Pana- 

 ma. 



Cyathula achyranthoides (HBK.) Moq. in DC, Prodr. 13 pt. 

 2:326. 1849. 



Golfo de Dulce, March 26, Elmore F14. 



