3816 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
finds a fragment of Clifford’s plant in the herbarium of the British 
Museum, which he identifies as the same as //. tomentosus, our most 
common species. This conclusion is really surprising, for our very 
abundant Mexican material does not at all resemble Linnweus’s figure. 
This difference is due, Mr. Baker thinks, to the fact that Clifford's 
plant was evidently young. While of course I am willing to accept 
Mr. Baker’s conclusion, still I wish to keep in sight the possibility of 
1. tomentosus being a distinct species. It is possible that Houston's 
herbarium specimen (prepared probably in Mexico) may be different 
from the plant grown by Clifford even if the seed was sent by Houston. 
In fact, IT have myself found //. tomentosus and [1 appendiculatus 
growing side by side. Again, //. americanus is said to have come from 
Vera Cruz, while //. tomentosus probably does not grow at such low 
elevations. I have collected it myself at an altitude of 3,500 to 4,000 
feet. In the light of Mr. Baker’s review and my recent studies of the 
genus, I wish to make the following changes and additions to my 
paper: 
Heliocarpus americanus L, Sp. Pl. 1: 448. 1753. 
H. tomentosus Turez. Bull. Soe. Nat. Mose. 311: 225. 1858. 
Heliocarpus donnellsmithii Rose, Bot. Gaz. 31: 110. pl. 7. 1901. 
Mature leaves nearly orbicular, not lobed, rounded at base, shortly acuminate 
(tips mostly broken), glabrous and shining above, nearly glabrous beneath, pal- 
mately 3 to 5-veined from the base, somewhat glandular-toothed especially at base; 
inflorescence a large spreading panicle; sepals not appendaged; stipe slender, 5 mm. 
long; body of fruit oblong, 5 mm. long; the seeds somewhat hairy, becoming gla- 
brate and rugose in age. 
Collected by Capt. John Donnell Smith near Arenal, Department Alta Verapaz, 
Guatemala, altitude 967 meters, April, 1889 (no. 1722, type); and by Charles L. 
Smith at Coatzacoalcos, Isthmus of Tehuantepec, State of Vera Crnz, 1895 (no, 1002). 
This species is very different from the numerous Mexican species but is near 7. 
americanus schumannt Baker, from which it differs in its more glabrous leaves and in 
the absence of hairs both from the leaves and inflorescence. 
Heliocarpus microcarpus Rose, sp. nov. 
A small tree, 3 to 5 meters high; young branches densely stellate; leaves broadly 
ovate, 5 to 12 em. long,38 to 8 em. broad, acuminate, cordate at base but with a rather 
shallow sinus, pubescent on both surfaces, the pubescence on under surface white 
and matted; inflorescence a very open panicle; flowers not seen; fruit sessile, orbicu- 
lar or a little elongated, the body 3 mm. in diameter, fringed with a row of plumose 
hairs. 
Collected by J. N. Rose and Walter Hough near Cuernavaca, May 27-30, 1899 
(no, 4535), and at the same place by C. G. Pringle, November 28, 1902 (no. 8719, 
type). 
Resembling 77. nelsoni: but with fruit smaller, without plumose hairs on the faces 
of the fruit, with much shallower sinuses at base of leaves, ete. 
Here should probably be referred material collected at Cuernavaca and included 
in HH. nelsoni. 
Heliocarpus popayanensis purdiei Baker, Journ. Bot. 86: 132. 1898. 
This variety is based on Purdie’s specimen in the Kew Herbarium collected near 
Velez, New Granada. 
