ON SOUTH-AMERICAN APOCYNACER, 131 
margins subrevolute, opake above, covered with whitish small pimples, below clothed 
with whitish tomentum, hirsute on the midrib, 2-23 in. long, 74-94 lines broad, on 
petioles 2-4 lines long; peduncle 4-43 in. long; sepals 94-114 lines long, with numerous 
inner scales; corolla 44 in. long, softly puberulous; tube slender, swollen in the mouth 
for $ of its length in a subcampanular form ; segments as long as the swollen portion of the 
tube; ovaries clothed with woolly hairs; follicles 10 in. long, torulose, nearly smooth. 
A species near M. longiflora, principally differing in its clothing. 
6. MacrosIPHONIA VERTICILLATA, Müll. Z. c. p. 140: Echites petrea, St.-Hil. Mém. Mus. xii. 321; 
A, DC. 7. c. p. 472. In Brasilia: non vidi. 
A species growing in the extreme south-western portion of the province of Rio 
Grande, as far as Montevideo, and in Uruguay. It is a suffruticose, erect plant, its 
stem dichotomous at the apex, from 6 to 18 in. high, covered with dull red softly hirsute 
hairs, its lower leaves ternate or quaternate, upper ones opposite, closely imbricated, linear 
lanceolate, acute at the apex, obtusely cordate at the base, margins very revolute, sub- 
rugous above, sparsely hirsute with reddish hairs, beneath cano-tomentous, with a pro- 
minent midrib which is reddishly hirsute, 8-16 lines long, 1-5 lines broad, on petioles 
i-i line long; peduncle in the axils or dichotomy of the stem, solitary, 1-flowered, 24-6 
in. long; pedicel short, with 3 or 4 bracts 3 lines long, cano-tomentose; sepals acutely 
lanceolate, tomentously pilose; corolla 34-44 in. long, with an elongated slender tomen- 
tous tube, gradually dilated and reddish at its summit, villous within at the contraction 
of the tube, where the stamens are inserted; segments roundish, inequilateral, with 
crispate margins; 2 slender follicles (6 in. long in the immature state), subarcuate, 
torulous, acute, pubescent. 
7. MACROSIPHONIA PINIFOLIA, nob.: Macrosiphonia verticillata, var. pinifolia, Müll. l. c. p. 141: Echites 
pinifolia, St.-Hil. Mém. Mus. xii. 325; A. DC. /. c. p. 471. In prov. Goyaz, et in confinibus prov. 
Minas et St. Paulo: non vidi. 
A valid species, though regarded as a mere variety of the preceding by Müller. It is 
remarkable for its very small hispid leaves; its stem is erect, hispid, scarcely 8 in. high; 
its leaves are very crowded, verticillately quaternate, narrowly linear, with revolute 
margins, hispid above, cano-tomentous beneath, 6-94 lines long, 3-1 line broad; the 
- peduncle varies from 4 to 63 in. in length; tube of corolla extremely long, according to 
its age; segments crispate. The flower is odorous. 
8. MacnosrpHONIA ProstraTa, nob.: Echites multifolia, nob. olim in Trav. ii. p. 531: Echites grandi- _ 
flora, Hook. var. minor, Journ. Bot. i. 286. In regione Argentina, (Pampas) prov. Cordova : v. v. 
et sicco in herb. meo (Punta de Agua). ; 
A very pretty species, collected by me iv 1825, when I made coloured drawings. of it, 
with copious descriptions. It has a napiform root, throwing out several slender, simple, 
prostrate pilose stems, less than a foot long, sometimes shortly branched near the base, 
the axils 6-8 lines apart, bearing in each 3 verticillate linear-oblong membranaceous 
leaves, acute at the summit, bisinuately truncate at the base, with subrevolute margins, 
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