ADDISONIA 55 
(Plate 68) 
HARRISIA MARTINI 
Martin’s Harrisia 
Native of Argentina and Paraguay 
Family CACTACEAE Cactus Family 
Cereus Martint Labour. Ann. Soc. Hort. Haute Garonne —. 1854. 
Eriocereus Martini Riccob. Boll. Orto Bot. Palermo 8: 241. 1909. 
Harrisia Martina Britton, comb. nov. 
A slender vine-like cactus, clambering over bushes, or nearly 
prostrate, often six feet long or longer, branched, the branches a 
little less than one inch thick, with four or five low ribs or angles, 
the depressions between the ribs D ahallow and narrow. ‘The areoles, 
borne on the ribs, are small and circular, and usually bear a rather 
stout single spine about one inch long, brownish or straw-colored 
with a blackish tip, and several short radial spines, sometimes 
half as long as Ss central one, but usually shorter. ‘The flowers 
appear singly at one or more of the areoles and are from five 
inches to about eight inches long; the nearly cylindric tube is 
about as long as the limb, or a little longer, and about one half 
an inch in thickness, bearing several short, broad, pointed, ovate 
scales, similar to those borne on the somewhat tubercled ov ary 
and with brown felt in their axils; the widely spreading outer 
perianth-segments are nearly linear, long-pointed, greenish-brown, 
sie do. to three 2 sone and about one quarter of an inch wide, 
pink when the inner perianth-segments are nearly 
as Saag é as the outer nite ani about three times as wide, and abruptly 
broad-tipped, white, or tinged with pink; the stamens are about 
two-thirds as long as the ie gaat ts and the style otal 
wi 
and a 
bears a small ovate eae on each ewe. and is usually spineless. 
When first described in 1854, the habitat of this cactus was 
unknown, but it was subsequently found to grow in the deserts of 
Argentina and Paraguay; it is now common in collections of cacti 
and flowers frequently in greenhouses. ‘The Italian botanist Ricco- 
bono recognized this plant and some of its relatives as a generic 
group distinct from Cereus and proposed for them the generic 
name Eriocereus, in 1909, the same year in which I proposed the 
generic name Harrisia (see plate 61 of this work); his account, 
published in the Bulletin of the Royal Botanical Garden of Palermo 
