252 THE CACTACEAE. 
On page 29, vol. 1, under Pereskiopsis pititache, add to illustrations: Deutsche Gart. 
Zeit. 8: 33, as Pereskia calandriniaefolia. 
On page 30, vol. 1, insert the following: 
11. Pereskiopsis scandens sp. nov. 
Slender, climbing or clambering over walls, up to 10 meters long; branches terete, grayish, 
smooth: areoles circular, white-woolly when young, gray in age, with a short spine (5 mm. long) 
and a bunch of brown glochids in the upper edge; leaves ovate, 1.5 to 2 cm. long, glabrous, acute; 
flowers yellow, from the areoles on old branches, appearing in June; fruit maturing slowly (perhaps 
requiring 2 to 3 years to ripen), very narrow, 5 to 7 cm. long, somewhat tubercled, with a deep 
umbilicus; seeds few. 
Living specimens of P. scandens were sent by Dr. George F. Gaumer from Izamal, 
Yucatan, Mexico, in July 1921 (type). It was also collected by A. Schott at Mérida in 
1865 (No. 409). 
Withdraw the name Pereskia zehntneri from page 14, vol. 1, and substitute the fol- 
lowing at the end of Pereskiopsis on page 30: 
{ ] &) 1a. QUIABENTIA gen. nov. 
A low, leafy, mizdh brariched shrub with numerous horizontal branches, usually in whorls; 
leaves fleshy but flattened, stiff, borne at right angles to the branches; areoles large, white-felted, 
often with numerous spines, these acicular and white, the upper part of areole bearing glochids; flowers 
terminal, very large, bright red; ovary leafy, very narrow; stamens numerous, a little shorter than 
the style, much shorter than the petals; style short and stiff; stigma-lobes very short, obtuse; seeds 
white, a little flattened, covered with a hard bony aril as in Opuntia. 
A monotypic genus, native of the semiarid region of Bahia, Brazil. The generic 
name is from quiabento, the native name of the plant. 
1. Quiabentia zehntneri Britton and Rose. 
Pereskia zehntneri Britton and Rose, Cactaceae I: 14. 1919. 
Flowers at ends of branches, large, 7 to 8 cm. broad, 3 to 4 cm. long, bright red, appearing in 
November; petals broad, retuse; ovary borne in the upper end of the branch, very narrow, 3 to 4 
cm. long, bearing the usual leaves, areoles, and spines of the branches; fruit oblong to clavate, 6 to 
7 cm. long, 1.5 cm. in diameter at the top, slightly angled by the low elongated tubercles running 
downward from the small scattered areoles, and finally without leaves, spines, or bristles, sterile 
below, with thick fleshy walls and with a small narrow seed-cavity; umbilicus broad, slightly 
depressed; seeds thick with flattened sides rounded on the back, 5 mm. in diameter. 
In its large, red, rotate flowers this plant at once suggests a Pereskia. Its red flowers 
are sO similar to those of P. bahiensis of the same region that at first we considered the 
two species congeneric. Now that we have studied the fruit and seed it is evident that 
P. zehntneri belongs to a very different genus. Then, too, the old areoles develop deciduous 
spines or bristles which are doubtless glochids; these occur on the upper part of the 
areoles but do not form the definite brush of the Opuntiae. These glochids would exclude 
it from the Pereskieae. It must therefore be referred to the Opuntieae and next to Peres- 
kiopsis. In its broad, thick leaves it resembles that genus, but its flowers are terminal, 
very large, and rotate; its fruit is much elongated and the seeds are glabrous. 
We are indebted to Dr. Leo Zehntner, a very keen observer, for many fine specimens 
and much information regarding it. He has found it only on a small calcareous mountain 
near the city of Bom Jesus da Lapa, Brazil, but it has been transplanted to the Horto 
Florestal of Joazeiro where it is well established and where it flowered three years after 
being replanted. In 1915 Dr. Rose brought livin i ‘cal 
Garden from this stock (No. 19722). $ g specimens to the New York Botamica 
On page 32, vol. 1, under Pterocactus tuberosus } 
_- ? ” , add the m: O tia tuberosa 
albispina Salm-Dyck in Forster, Handb. Cact. ed. 2. git. 1885. eens 
Also add to illustrations: Haage and Schmidt, Cat. G 
, . t, t. ‘ . 7 t. 
Gén. f. 74, as Pterocactus kuntzei. * en. 230. 1908; De Laet, Ca 
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