110 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
NEW OR NOTABLE SPECIES OF GERANIUM FROM COLOMBIA AND 
VENEZUELA. 
In a large collection of plants secured in Venezuela by Dr. Alfredo 
Jahn there are specimens of several species of Geranium. One of 
these is apparently new, while a second has been known previously 
only from the type collection. In 1906 Mr. Pittier obtained in 
Colombia specimens of another Geranium which can not be referred 
to any published species. 
Geranium stoloniferum Standley, sp. nov. 
Perennial from a thickened caudex covered by the persistent imbricated stipules 
and petiole bases; plants producing long slender prostrate branches 30 to 50 cm. long, 
these rooting at the nodes and forming there thick caudices similar to the basal ones; 
stems slender, puberulent and bearing numerous somewhat retrose or spreading, 
subhispid hairs, the tips of the branches ascending, the internodes 2.5 to 15 cm. long; 
leaves numerous, usually densely clustered at each node; stipules lanceolate, atten- 
uate into a long subulate tip, 6 to 20 mm. long, dark brown to nearly black, puberulent 
on the outer surface; petioles slender, those of the basal leaves 5 to 8 cm. long, several 
times as long as the blades, those of the upper cauline leaves mostly shorter than the 
blades and only 2 to 10 mm. long; leaf blades rounded to subreniform in outline, 10 
to 28 mm. broad, thick and firm, yellowish green, prominently veined, at first sparsely 
hispidulous on the upper surface but soon glabrate, abundantly hispidulous beneath 
along the veins and the revolute margins, the blades 5-cleft (or the smaller ones only 
3-cleft) about three-fifths the distance to the base, the divisions broadly obovate to 
cuneate in outline, very shallowly 3-lobed at the apex, the lobes obtuse to broadly 
rounded, the divisions of the smaller leaves sometimes entire; peduncles usually 
2-flowered, about 15 mm. long, much longer than the subtending leaves, densely 
pilose with spreading whitish hairs and somewhat villous; bracts 4 to 5 mm. long, 
lanceolate, attenuate to a subulate tip; pedicels slender, 8 to 25 mm, long, densely 
pilose with spreading gland-tipped hairs; sepals 5 mm. long, narrowly oblong or 
elliptic-oblong, acutish, short-mucronate, pilose with spreading, often gland-tipped 
hairs; petals 1 cm. long, broadly cuneate-spatulate to obovate, shallowly emarginate, 
nearly glabrous; fruit not seen. 
Type in the U. 8. National Herbarium, no. 602320, collected in the Paéramo de la 
Cristalina, State of Trujillo, Venezuela, at an altitude of 2,900 meters, December 20, 
1910, by Dr. Alfredo Jahn (no. 126). 
It is not possible to determine with certainty the color of the petals, since they are 
discolored, but they appear to have been white or pink. Apparently of the same 
species is a specimen from the Paéramo de Timotes, State of Tachira, collected at an 
altitude of 3,000 to 3,500 meters, in March, 1910, by Doctor Jahn (no. 164). Thisisa 
mere fragment, but it agrees in the form of the leaves and flowers. 
The proposed species belongs to the section Diffusa, as outlined by Dr. R. Knuth.! 
It differs from most of the species of that section in its peculiar habit, bracteate 
2-flowered peduncles, and revolute leaf margins. It is most closely related to Geranium 
difusum H. B. K., a plant with ascending or nearly erect stems, mostly shorter petioles, 
much shorter stipules (3 to 4 mm, long), and petals only 7mm. long. It isalso related 
to two Venezuelan species, G. lindenianum Turez. and G. subnudicaule Turez., but 
both these are of different habit and have incised leaf divisions. 
‘In Engl. Pflanzenreich 53: 209. 1912. 
