ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS. 21 
Although probably common both in Texas and Mexico in the valley of the Lower 
Rio Grande, yet it has rarely been collected. Townsend’s plant is the only specimen 
we haye in the National Herbarium. The only other recorded collection is that of 
Dr. J. Gregg near Matamoras in 1847. 
There is still some doubt as to what is the uf. rariegata of Jacobi, but T have fol- 
lowed Engelmann and Baker in referring the specimen of the Rio Grande there. Be 
this as it may, Agere rariegata must bea Mantfreda. A species of Central Mexico has 
been referred to variegata by Dr. Watson, which should not be confused with the 
above. An excellent colored figure of this plant is furnished by Saunders. ¢ 
10. Manfreda elongata Rose, sp. noy. 
Stems 9 to 12 dm. high, glabrous throughout; leaves strongly recurved, deeply 
channeled, 3 dm. or more long, 5 em. broad, green, the margin entire; flowers 
rather thickly set; ovary 10 to 12 mm. long; perianth tube cylindrical, 12 to 14 mm. 
long, brownish; lobes linear, as long as or slightly longer than the tube; stamens 
abont 2.5 em. long, shorter than the style, inserted just below the top of the perianth 
tube. 
Collected by J. N. Rose in a narrow valley on the west side of the east range of the 
Sierra Madre in southern Durango, August 16, 1897 (no, 2541). 
11. Manfreda revoluta (Klotzsch) Rose. 
Agave reroluta Klotzsch, Otto & Dietr. Alle. Gartenz. 8: 274. 1840. 
Apparently described from specimens which flowered in the Berlin Botanical Gar- 
den in 1840. Described by Baker as having the leaves green, falcate, channeled 
down the face, and entire on the margin; perianth 3.1 to 3.6 cm. long, the tube 
equaling the length of the segments. Our labeled specimens, collected by Dr. Pal- 
mer at Saltillo, which have been referred here by Dr. Watson, seem to belong rather 
to Me brachystachys. 
12. Manfreda oliverana Rose, sp. nov. 
Leaves about 6,5 dm. long, at first erect, becoming somewhat bent in age, strongly 
channeled for two-thirds the length below, flat above, 3.1 em. broad, acute, the 
margin entire and smooth to the touch, purplish at base, elsewhere bright green; 
peduncle, including the spike of flowers, 1.8m, high, 6 or 8 bracteate below, the 
lower bracts leaflike, glaucous; flowers (in one specimen) 23, greenish yellow, soli- 
tary, sessile; ovary 1.8 cm. long, glancous; tube 1.6 to 1.8 em. long, funnel-shaped; 
segments glaucous without, 1.8 to 2 cm. long, at first, strongly recurved, but in a few 
days becoming nearly erect, the inner ones toothed on each side near the base; 
stamens erect, attached one-third the length of the tube from the top, 3.7 em. long; 
anthers pale yellow, 1.8 cm. long, style at first protruding from the side of the 
flowers, 
Rootstocks of this Manfreda were collected by J. N. Rose along the road between 
Colotlan and Bolafios, in the State of Jalisco, September 8, 1897, and were flowered 
hy Mr. George W, Oliver in the Botanic Garden at Washington, August, 1898 (no. 
376). 
| have named this species in honor of Mr. Oliver, who has taken great pains and 
‘terest in flowering many of my plants. 
.o. Manfreda guttata (Jacobi & Bouché) Rose. 
Agave guttata Jacobi & Bouché, Hamb. Gartenz, 21: 190. 1865. 
Agave protuberans Engelm. in Baker, Handbook Amaryl. 197, 1888, 
Leichtlinia protuberans Ross, Del. Sem. Hort. Bot. Panorm. 48, 1898, 
Leichtlinia commutata Ross, Te. Deser. PL. Nov. Rar. 10. 1896. 
Leaves 3 to 4 dm. long, spreading, linear to lanceolate, 1.6 to 5 em. wide, with 
nearly entire or denticulate margins, dull green with brown spots (not always shown 
6 
in dried specimens); perianth tube funnelshaped, very short, 6 to S mm, long; 
¢Refugium Botanicum 5: 6. 326, 
