104 gS PLANTH FENDLERIANZ. 
ae 424. Hevenium avurumnare, Linn. Bottom-land near the Mora River, ‘Au- | 
‘ Pes gust (467) ; and between Council Grove and Fort Leavenworth, Sept. (468.) | 
- +425. Amauria? pissecra (sp. noy.): herbacea, puberula; caule adscendente apice 
(pte norm chpeePe oevtibosi-polycephalo ; foliis alternis petiolatis biternatisectis segmentis cuneiformibus 
- sage Pi sublinearibus seepius 2—3-fidis, summis parvis ; pedunculis glandulosis; involucri | 
“i bby “ff squamis oblongo-lanceolatis. subtriseriatis, intimis subscariosis ; receptaculo convexo ; | 
ligulis circiter 16; styli ramis fl. disci cono brevissimo truncati-capitatis ; acheniis ad | 
angulos levibus.— A few miles east of Mora River; Aug. (537.) Also gathered in | 
Fremont’s third expedition, probably towards the head-waters of the Arkansas. — Stem | 
12 or 15 inches high, apparently from a perennial root. Leaves about an inch in diam- | 
eter, cut into narrow divisions. Peduncles clothed both with viscous and capitate-glandu- | 
lar hairs. Involucre herbaceous, more or less viscous, a third of an inch in diameter. 
Receptacle entirely destitute of chaff. Flowers all yellow: rays linear-oblong, 2- 
3-toothed; the tube very glandular. Disk-corollas with the slender tube extremely 
glandular, the expanded 5-cleft limb slightly so. Branches of the style short, flattish- = 
semiterete, capitate with a very short and flattish obtuse cone. Achenia cuneate-linear, %: 
é 
slender, compressed-quadrangular, smooth; the ovary sprinkled with sparse and minute 
hairs. Pappus none. —The specimen of Fendler has not matured fruit; and the sta- 
mens are abortive in all the disk-flowers. The specimen from Fremont’s collection, com- 
municated by Dr. Torrey, is very imperfect, but has ripe achenia. From the character 
of the Californian genus Amauria, Benth. in Bot. Voy. Sulph. p. 31, this plant differs very 
essentially in the styles, and in the convex receptacle. But I am unwilling to constitute 
it a distinct genus upon the present imperfect materials.* 
* Galinsoga parviflora, Cav., was gathered by Dr. Gregg at Saltillo, and by Dr. Wislizenus at Cosiqui- 
a Tiachi, Chihuahua. The specimens from the latter locality have the pappus of the ray reduced to a few 
setiform squamellz, and also in other respects agree with the Vargasia Caracasana, as described by De Can- ¢ 
dolle ; but not with the figure in Deless. g-e. Sel. 4. t. 47, where the pappus of the ray is represented nearly __ | 
‘ like that of the disk, and the latter as much shorter than the corolla instead of “ palez corolla triplo longi- 
ores.” Probably the Vargasia, DC., is not even specifically distinct from Galinsoga parviflora, as Mr. Ben- 
tham has intimated. At Monterey, Dr. Edwards and Major Eaton gathered Tridax procumbens, Linn. ; 
and Dr. Wislizenus’s collection contains a single specimen of a second species, with red or purple rays, 
viz. :— 
& 
Tripax BicoLor (sp. noy.): annua, humilis, glanduloso-pubentissima ; caule erecto; ramis apice modice 
nudis monocephalis ; foliis oblongis vel lanceolatis integerrimis (an semper) ; paleis receptaculi oblongis longe 
acuminatis 3 ligulis rubris cuneati-oblongis breviter 3-lobis ; pappo purpurascente e setis -circiter 20 achenium 
gequantibus corolla disci atque tubo ligularum dimidio brevioribus. — At Llanos in the Sierra Madre, 
Chihuahua, Dr. Wislizenus : flowering in November. - 
west of 
— The specimen is only a span high, somewhat cine- 
