318 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Tilia houghi Rose, sp. nov. 
A small tree, 8 to 10 meters high; young branches clothed with brown matted 
hairs; leaves nearly orbicular, 10 to 15 cm. long by 8 to 12 em. broad, abruptly short- 
acuminate, somewhat oblique at base with a broad shallow or moderately deep sinus, 
very pale and densely stellate-pubescent beneath, dark green and glabrous above, the 
margin sharply serrate; the winged peduncle subsessile, very broad, obtuse, not 
‘reaching to the cyme; pedicels and buds densely stellate-pubescent, almost white. 
Collected by J. N. Rose and Walter Hough in a mountain canyon above Cuerna- 
vaca, Morelos, May 27-30, 1899 (no. 4398). 
Distinguished from 7. occidentalis by its large broader leaves, which are much paler 
beneath and covered with a finer pubescence. 
It gives me great pleasure to name this interesting tree for my companion in Mexi- 
can travels, Dr. Walter Hough of the U. 8. National Museum, 
MALVACEAE. 
THREE NEW ABUTILONS. 
Abutilon holwayi Rose, sp. nov. 
Undoubtedly perennial and perhaps tall; branches slender with short spreading 
glandular hairs; leaves ovate, 8 to 10 cm. long, cordate at base (the sinus either 
closed or open), acuminate, crenate, the under surface with pale soft stellate pubes- 
cence, the upper surface stellate and with additional simple stiff hairs; petioles 2 to 
6 cm. long; stipules small, linear, deciduous; inflorescence forming a leafy panicle; 
flowers axillary, on peduncles 2 to 8 em. long; calyx 10 mm, high; sepals broadly 
ovate; petals yellow, perhaps not longer than the sepals, but open flower not seen; 
carpels 10 or more, long-acuminate, a little longer than the calyx lobes; cells 3-seeded. 
Only known from about Oaxaca City. 
Collected on Monte Alban by Charles L. Smith, October 4, 1894 (no, 636), and 
near Oaxaca City by E. W. D. Holway, November 10, 1903 (no. 5374, type). 
Abutilon dentatum Rose, sp. nov. 
Apparently shrubby at base; branches densely stellate-pubescent with both coarse 
and very fine hairs; leaves broadly ovate, 7 to 10 em, long, 4 to 6 em. broad, strongly 
cordate at base, acuminate, coarsely toothed, densely stellate on both sides but the 
hairs finer and more matted beneath; flowers axillary; peduncles 1 to 4 em. long, 
densely stellate, jointed near the apex; calyx lobes broadly ovate; carpels densely 
stellate, beaked. 
Collected by C. G. Pringle, under dry cliffs, rocky hills near Chihuahua, October, 
1885 (no. 306). This species was by Dr. Gray referred as a variety to A. berlan- 
dieri, but it surely must be distinct. Since Dr. Gray does not give a word of descrip- 
tion his name is a nomen nudum. It is also so published by E.G, Baker in his 
revision. It differs from A. berlandieri in having the leaves more cordate at base, 
more acuminate, the teeth stronger and sharper, the sepals broader, ete. 
Abutilon simulans Rose, sp. nov. 
Tall, often 2 to 3 meters high, much branched; branches purplish, bearing short 
stiff more or less glandular hairs; leaves broadly ovate, nearly orbicular, with a deep 
sinus at base and broad rounded over-lapping lobes, long-attenuate at tip, 15 to 18 
em. long, 5 to 10 em. broad, the undersurface white with a very fine dense soft stel- 
late pubescence, the upper surface green but much less stellate, the margin crenate; 
petioles much shorter than the blades; stipules caducous; flowers axillary; pedun- 
cles 3 to 4.em. long, joined near the apex; calyx 8 to 10 mm. long, its lobes broadly 
ovate and overlapping at base, finely stellate and with a few long silky hairs; corolla 
3.em. broad, yellow; carpels with long slender beaks, 
