14 TRIURIDEZ AND BURMANNIACE® 
D. longistyla, though still nearly allied to the Brazilian ones, is more 
decidedly distinct, and in the Hookerian herbarium are a number of 
specimens gathered by Purdie in the woods of Maracaybo, in New 
x Granada, which, besides their remarkably large and rigid stature, show 
a decided character in the long tubular shape of the perianth. In giv- 
ing it the collector's name, with the subjoined diagnoses,* I do not 
however pretend to decide on the relative value of these characters to 
those by which Mr. Miers distinguished his species, as it requires a 
' more complete acquaintance with all these forms in different stages of 
growth, and under different eireumstances, to judge which of them are 
specifically distinct, or whether they should all be considered as more 
or less permanent varieties of one species. 
PTYCHOMERIA, genus novum Burmanniacearum e tribu Dictyostegearum. 
—Char. gen. Perianthium infundibulare, tubo longo sub apice demum 
circumscisso, limbi decidui laciniz 3 exteriores latæ patentes subtri- 
lobe, lobis lateralibus aleeformibus aute anthesin inflexis, 3 interiores 
parve vel nulle. Stamina versus apicem tubi 3, cum limbo decidua, 
filamentis brevissimis, antheris bilocularibus, loculis distinctis, con- 
nectivo subdilatato inappendiculato. Ovarium in fundo perianthii 
adnatum uniloculare, placentis parietalibus multiovulatis. Stylus 
apice trilobus, lobis inerassato-dilatatis supra nonnunquam bicornutis 
v. biaristatis. Capsula subglobosa, perianthii tubi parte persistente 
coronata, apice ad maturitatem irregulariter rupta. Semina angu- 
lato-globosa, verrucosa, embryone exalbuminoso.—Herbe annus in- 
ter folia emortua in sylvis Brasilize crescentes, colorate v. hyaline. 
-Folia et bracteze squamseformia, cauli concolora. Inflorescentia Bur- 
|. mannie ; cyma nempe terminalis bifida, pedicellis secus ramos sim- 
plices erectis recurvisve brevibus unifloris, nune in capitulum con- 
- tracta bracteis sepe conspicuis imbricatis, nunc laxa squamis brac- 
-~ tealibus minutis v. omnino inconspicuis. - 
$1. Dretomerta.—Lacinie perianthii inferiores 8 parve denti- 
= formes. Bractee sepius squamis caulinis submajores. 
1. P. fimbriata ; humilis, rigida, squamis ovatis lanceolatisve, cyma sub- 
capitata, floribus sessilibus bracteisque orbiculatis imbricatis, perian- 
. thii laciniarum exteriorum lobo medio fimbriato.—ZZeróa 3-4-pol- 
* D. Purdieana, sp.n.; rigida, elatior, perianthii parte libera ovario plus duplo 
longiore.— Habitus et inflorescentia D. orobanchioidis. Caulis I 1E pedali. Peri- 
-anthium 3 lin. longum, laciniis interioribus parvis. Cætera D. orobanchioidis,—In 
sylvis humidis montium provincie Maracaybo Nove Granate (Purdie). : 
