524 F.Fedde und K. Schuster: Index novorum Siphonogamorum [506 
Psacalium obtusilebum (Rob. et Greenm.) Rydb. 1. ec. p. 374 (= Cacalia 
obtusiloba Rob. et Greenm.). — Oaxaca (Pringle n. 5840). 
P. peltigerum (Rob. et Seaton) Rydb. 1. ec. p. 374 (= Cacalia peltigera Rob. 
et Seaton). — Jalisco (Pringle n. 9872. 4627. 5154, Palmer n. 171). 
P. Nelsonii Rydb. 1. c. p. 374. — Oaxaea (E. W. Nelson n. 1111). 
P. poculiferum (S. Wats.) Rydb.]. c. p. 375 (= Cacalia poculifera S. Wats.). — 
Jalisco (Pringle n. 9874. 4414), Tepie (Rose n: 1935). 
P.tabulare (Hemsley) Rydb.].c.p. 375 (= Senecio tabularis Hemsl. = Cacalia 
tabularis A. Gray — Cacalia macrota Sch.-Bip.). — Veracruz (Bourgeau 
n. 2926), Puebla (Purpus n. 5630). 
P. Langlassei Rydb. 1. c. p. 376. — Guerrero (E. Langlasse n. 576). 
Psednotrichia australis Alston in Kew Bull. 1925. p. 363. — Cape Province 
(Mrs. Levyns n. 1059). 
Pseudoclappia Rydberg gen. nov. in Journ. Wash. Acad. Sci. XIII (1923) 
p- 288. 
The plant can not be included in Clappia since it lacks the resinous 
striation of the bracts and the fimbrillae on the receptacle, and the bristles 
of the pappus are neither flattened nor paleaceous at the base. It can 
not be included in Senecio since the involucre is without caliculum and 
its bracts of a different texture, the pappus-bristles are stiffer than is 
usual in that genus, and the style-branches are distinetly Vernonioid, 
neither truncate nor with a hair-pencil at the end. The genus should, 
however, :be referred to the tribe Senecioneae, subtribe Senecionanae, 
nothwithstanding the Vernonioid style. A more or less vernonioid style 
is found also in the genera Gynura, Emilia und Psacalium. 
P. arenaria Rydb. 1. ce. p. 289 (= Clappia suaedaefolia Woot. et Standl., non 
A. Gray). — New Mexico (Wootan n. 2618. 483, Griffiths n. 4243). 
Psiadia leucophylla (Bak.) Humb. in Mem. Linn. Normandie XXV (2. Ser. 
IX, Caen 1923) p. 46 (= Vernonia leucophylla Bak. = Conyza miniata 
Klatt). — Madagascar (Baron n. 2104, Hildebrandt n. 2622, Perrier de la 
Bäthie n. 12918). 
P. tsaratananensis Humb.]. e. p. 46 et 286. — Madagascar (Perrier de la Bäthie 
n. 2876). 
P. hispida Benth. et Hook. var. ß. auriculata (Bak.) Humb. 1. e. p. 47 (= P. 
auriculata Bak.). — Madagascar (Baron n. 780. 4287, Viguier et Humbert 
n.. 1237). 
P. nigrescens Humb. 1. e. p. 49 et 285. — Madagascar (Baron n. 6542, Hilde- 
brandt n. 3359, Perrier de la Bäthie n. 2807. 2915. 3157. 3158. 3208). 
P. altissima Benth. et Hook. var. a. latifolia Humb. 1. ce. p. 50 et 284. — Mada- 
gascar (Alluaud n. 113, Paroisse n. 3). 
var. ß. occidentalis Humb. 1. e. p. 50 et 284. — Madagascar (Greve 
n. 77, Perrier de la Bäthie n. 674. 2893). 
var. y. boinensis Humb. 1. ce. p. 50 et 284. — Madagascar (Perrier de la 
Bäthie n: 3275). 
var. ö. decurrens (Klatt) Humb. 1. e. p. 50 (= P. decurrens Klatt). — 
Madagascar (Baron n. 1692, Boivin n. 1739, Catat n. 1118, Hilde- 
.‚brandt n. 3541, Humblot n. 339, Perrier de la Bäthie n. 1477. 
2833. 3276, Viguier et Humbert n. 652. 1405). 
var. e. stenophylla (Bak.) Humb. 1. e. p. 51 (= P. stenophylla Bak.). — 
Madagascar (Baron n. 3540. 3549). 
