80 ROBINSON. 
l. ec. The following are with some doubt referred here: Loreto: 
Tarapoto, 1835, Mathews, no. 1417 (K.), and AMazonas: Prov. Cha- 
chapoyas, Mathews (K 
Persistent effort has thus far failed to disclose in North American 
herbaria any material which can with entire confidence be placed in 
this species. It is hard to understand just why Hieronymus takes 
the trouble to distinguish the plant from the geographically remote 
and as to habit dissimilar EF. prunellaefolium HBK. of Mexico, yet 
appears to feel no obligation to point out the much-needed distinctions 
between E. articulatum and the closely related E. vallincola DC. and 
E. pichinchense HBK. of similar Andean distribution. While it is 
impossible at present to unite these species, the types of which appear 
to differ in several minor features, the characters thus far known to 
separate them are exceedingly trifling, such as pubescence, length of 
the petiole, number and size of the teeth of the leaves, etc., matters 
in which considerable variation has already been observed. 
70. E. propum N. E. Brown. Herbaceous (at least above), much 
branched and very leafy, covered throughout with soft gland-tipped 
and viscid hairs; stems round, weak, pithy; leaves opposite or the 
upper subalternate, ovate, acute to acuminate, the cauline rounded 
to truncate or open-cordate at base, serrate (teeth about 7 on each 
side), thin, green and thinly pubescent on both surfaces, 3-nerved 
from the very base (the nerves villous beneath), 2-4.5 em. long, 1.3-3 
em. wide, delicately membranaceous; petiole 1.5-2.5 cm. long, 
dular-pubescent; corymbs terminal, fastigiately branched, flattis 
topped, sometimes 1 dm. in diameter, 12-15-headed, a 
much smaller and only 1-5-headed; pedicels (in greenhouse materia 
2-5 em. long; heads 80-100-flowered, 12 mm. high and thick; mnvo- 
lucre about 2-seriate, campanulate, the scales about 20, eee 
acute, thin, green and pubescent toward the mostly — 4 : 
scarious on the margin and toward the tip; corollas white, eon 
puberulent on the short limb, the tube about 1.7 mm. long, $ wily 
the throat subcylindric-campanulate, 3 mm. ee achenes upwa 
hispid on the angles, about 2.5 mm. long, crowne : : 
cajun ssaiiniphineit® disk; pappus-bristles bright white 
nearly smooth.— Gard. Chron. ser. 3, vii. 321, fig. 48 pst ee 
introduced into horticulture about 1870 by Mr. Wilson Saunders, 
raised it from seed collected presumably in Peru by Mr. eae ‘5 in 
cultivated specimen from which the above character ae nee 
the herbarium at Kew. It has thus far proved imposstbie 
it with any material collected in Peru. 
