236 Cactaceae atque alcae succulentes novae. V. 
- DH 
40. Ipomoea Robinsonii J. D. House, l. c., p. 257. 
A slender, glabrous, twining vine with zig-zag leafy branches; leaf- 
blades elliptical-oblong, rounded at base, apex obtuse or subacute, 6— 
8 cm long, 2—4,5 cm broad, punctate; petioles 1—2 cm long; peduncles 
1-flowered, less than 2 em long, the two large yellowish-green bracts 
elliptical-lanceolate and acute, tapering to. the base; sepals orbicular- 
ovate, rounded at apex, 7—9 mm long; corolla slender funnelform, 
6—8 cm long, white, the limb 3,5—4 cm broad, with 5 rounded lobes; 
stamens nearly as long as the corolla; capsules ovoid, 1 cm long, 
apiculate. 
Mexico: Morelos; Lava beds near Cuernavaca, Pringle 7338, 1896 
(type — 6). 
41. Ipomoea umbraticola J. D. House, 1. c., p. 259. 
Perennial; stems furrowed, twisted below, glabrous; leaf-blades 
ovate, entire or usually 3-lobed, cordate, 6—10 cm long, nearly as 
broad, with some minute hispidulous pubescence above, glabrous or 
nearly. so beneath, middle lobe oblong, acuminate, laterallobes spreading, 
acute, subtriangular; petioles filiform, shorter than the blades; peduncles 
stout, longer than the leaves, angled, 10—15 cm long, cymosely many- 
flowered; pedicels 1—2 cm long; sepals glabrous, flavescent, subequal, 
4,5— 5 mm long, suborbicular, imbricated, retuse and mucronulate; corolla 
iunnelform, 4 cm long; capsules ovate, obtuse, 7—8 mm long, 2-celled; 
seeds glabrous. 
Costa Rica: Nicoya, Tonduz 13677 (ex Herb. H. Pittier), 1900 
(type — Y). 
LXIV. Cactaceae atque alcae succulentes novae. V. 
(Ex: Monatsschr. Kakteenkunde, XIX [1909], pp. 1—96.) 
29. Mamillaria chapinensis Eichlam et Quehl, l. c., p. 5. 
Simplex, ex omnibus partibus corporis valde proliferans et dein 
caespitosa, obscura viridis, mamillis tetragono-pyramidatis; aculeis radiali- 
bus 5—9 parvis castaneis vel albis, centralibus 1—8 saepe longissimis, 
rubescentibus vel castaneis; floribus flavidis; axillis lanatis et setosis. 
Guatemala: In der Nühe des Rancho San Agustin. 
In das System ist sie unter Nr. 97a hinter M. Karwinskiana und 
M. mutabilis einzureihen. 
30. Rhipsalis Novaésii (Loefgr.) Gürke, 1. c., p. 12, c. fig., p. 13. 
Ramosa, ramis crassis, ramorum inferiorum areolis dense congestis, 
setis munitis, ramorum superiorum areolis glabris; floribus lateralibus 
maximis, flavescente-albis, ovario immerso. 
Als reich verzweigter, 60 cm hoher Strauch, in der Kultur aufrecht, 
an seinem natürlichen Standorte wohl aber parasitisch auf Bäumen 
wachsend. Die unteren Glieder sind stielrund, 6—8 mm im Durchmesser, 
graugrün, mit ziemlich dicht stehenden Areolen; diese sind kreisrund 
