ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS, 315 
growing among the volcanic rock along the trail which crosses the pedregal. Only 
one tree was seen during a whole day spent in this region, although others are 
doubtless to be found. It is a quite different species from my C. occidentalis, which 
grows in the low land along the west coast of Mexico, 
POLYGALACEAE. 
A NEW POLYGALA. 
Polygala compacta Rose, sp. nov. 
Shrubby at base, the stems numerous, erect or ascending, very slender, 10 to 12 
cm. long, pubescent; leaves lanceolate to elliptical, obtuse, narrowed at base into a 
very slender petiole, puberulent, 1 to 2 cm. long; sepals lanceolate, acute, ciliate on 
the margin; wings broad; capsule puberuler t, a little longer than broad, rounded at 
base, notched at apex; aril umbonate, the margin 3-lobed. Near but hardly iden- 
tical with the P. pubescens of Chodat’s Monograph, but in any case Chodat’s name 
is to be rejected. 
Collected by C. G. Pringle in Valley of Mexico, August 25, 1896 (no. 6425). 
VITACEAE. 
A NEW GRAPE FROM EASTERN MEXICO. 
Vitis biformis Rose, sp. nov. 
Tall vines; bark shredding, without distinct lenticels; young shoots and leaves 
densely covered with a brown tomentum hiding a short close pubescence; old leaves 
still pubescent above and with a more or less distinct cobwebby covering beneath, 
broadly ovate in outline, sometimes 3-lobed, shortly acuminate, with very small 
sharp teeth, and with a broad U-shaped sinus (rounded at its base); clusters rather 
small, 5 to 7 em. long, but densely fruited; rachis pubescent; pedicels warty, stout; 
fruit blue-black, small, about 6 mm. in diameter. 
Collected near Las Canoas by J. N. Rose, July 15, 1899 (no, 4882, type) and near 
the same locality by Dr. E. Palmer, 1902 (no, 252). 
This species is near J. berlandiers, but the leaves are of duller color, the teeth 
smaller, ete. , 
TILIACEAE. 
NOTES ON HELIOCARPUS, WITH NEW SPECIES. 
In 1897 I published a synopsis of the species of Heliocarpus,“ describ- 
ing 5 species as new, restoring 6 old ones, and taking up the 3 recent 
ones of Dr. S. Watson. Dr. K. Schumann had previously studied the 
genus, reducing all the named species to JZ, amerecanus. 
In 1898 Mr. E. G. Baker published a short but very important 
review” of my paper, accepting my expansion of the genus and differ- 
ing from me only ina few details; he described two new varieties and 
reduced to varietal rank, under //. popayancusis, LT, trichopodus, a 
species which I had doubtfully restored after a study of the deserip- 
tion only. 
As Ihave pointed out, the type of the genus is //. americanus Lh, 
which is figured in the Hortus Cliffortianus, a species which T was not 
able to make out after a study of a large suite of specimens. Mr. Baker 
«Contr. Nat. Herb. 5: 125-129. ’ Journ, Bot. 86: 130-182. 
