Perqularia. | ASCLEPIADE# (Brown). 757 
XXIV. PERGULARIA, Linn. (not of other Authors). 
(Dania, R. Br.) 
Calyx 5-partite. Corolla-tube campanulate or cylindric ; lobes 5, 
widely spreading, overlapping in bud. Corona double ; outer corona 
arising at the base of the staminal column, membranous, annular, 
shortly 5-lobed ; inner corona of 5 erect fleshy lobes adnate to the 
staminal column up to the anthers, free above and produced into 
subulate horns incurved over the staminal column, and at the base 
produced into spreading or deflexed spurs. Staminal column arising 
at the mouth of the corolla-tube, entirely exserted ; anthers erect, 
terminated by a membranous appendage, intlexed over the apex of 
the style. Pollen-masses solitary in each anther-cell, pendulous, 
flattened, attached in pairs to the pollen-carriers by their tapering 
ends, without caudicles. ollicles lanceolate, smooth or echinate. 
Seeds crowned with a tuft of hair. 
Perennial twining plants ; leaves opposite, cordate ; flowers of moderate size, 
in long-peduncled corymbs or racemes, sublateral at the nodes. 
DistrisB. Species 4, all occurring in Tropical Africa, 2 of them extending 
through Arabia and Syria into India, and 1 into Madagascar. 
This genus has been misunderstood by all authors, including myself. When 
describing the Tropical African Asclepiads I did not examine Linneus’ definition 
of theigenus Pergularia as given in his Mantissa, i. 8, but now that I have done 
so, I find that he has there so accurately and unmistakably described the floral 
structure of the plants upon which Robert Brown afterwards established the genus 
Demia (but with such a very erroneous description that it would be utterly 
impossible to correctly refer any plant to it, except for the synonymy given), that 
there can be no doubt whatever as to the identity of Demia with Pergularia, since 
the structure is peculiar and not to be confused with that of any other genus, and 
the characters of Pergularia as given by Linneus do not at all accord with those of 
the plants hitherto supposed to belong to Pergularia. I have therefore re-estab- 
lished Pergularia in accordance with the definition of it given by Linneeus. For 
& more complete account see the Kew Bulletin, 1907, 323. For the genus hitherto 
known as Pergularia I have there proposed the anagrammatic name Prageluria, 
but it has since been discovered that the name Zelosma (Coville in Contrib. United 
States Nat. Herb. ix. 385, published in 1905) has the prior claim. 
Stem glabrous or very minutely puberulous ... ... (1) gariepensis. 
Stem with a very distinct spreading pubescence or 
somewhat hispid fee ale ce ... (2) extensa. 
1. P. gariepensis (N. E. Br.) ; stem twining, very finely puberu- 
lous or glabrous ; leaves probably somewhat fleshy; petiole }—1 in. 
long, puberulous ; blade #1} in. long, 4-1} in. broad, broadly ovate, 
acuminate, deeply cordate at the base, with a broad obtuse sinus 
more or less enclosed by the incurved rounded basal-lobes, green 
and glabrous on both sides or with a few very minute hairs on the 
veins beneath; racemes (including the peduncles) 3-6 in. long, 
_ glabrous or nearly so on all parts except the corolla; pedicels 6-10 
lin. long; sepals erect, 14-13 lin. long, 3 lin. broad, lanceolate, 
acute ; corolla glabrous outside ; tube 14-2} lin, long, campanulate ; 
