98 UNITED STATES AND MEXICAN BOUNDARY. 
part of California, near the Colorado; Thurber. Near Fort Yuma; Lieut. Du Barry. Ошу 
a single specimen of this interesting plant (but in a more advanced state than Mr. Thurber’s) 
was gathered by Lieut. Du Barry, and communicated to Dr. Torrey. The latter pointed out 
the oversight I had committed in respect to the pappus, and which led me wrongly to refer the 
plant to Psathyrotes, whereas it technically belongs to the Heleniee, and adds another genus 
to that subtribe. The five thin pale: of the pappus are beautifully dissected into stiff capillary 
bristles, of which the central one is somewhat the longest, and the rest on each side successively 
shorter. Involucre loosely very woolly externally ; the thin and lax scales oblong and oblong- 
lanceolate, nerveless, and about as long as; he disk. 
HULSEA, Torr. & Gray, (Nov. Gen.) 
Capitulum multiflorum, radiatum ; floribus radii ligulatis foemineis, disci tubulosis. Involu- 
crum hemisphericum ; squamis subtriseriatis membranaceis laxis, extimis paullo brevioribus. 
Receptaculum planum, epaleaceum, alveolato-dentatum, dentibus brevibus corneis. Ligule 
20-30, lineares. Corolle fl. herm. tubo gracili viscoso-glanduloso, fauce cylindraces, limbo 
5-dentato, dentibus triangulari-ovatis fere glabris. Anthera ecaudate. Styli rami obtusi, 
longitrorsum puberuli, exappendiculati. Achenia conformia, linearia, subtetragono-compressa, 
deorsum attenuata, villosa praesertim ad margines. Pappus (villis achenii vix longior) e paleis 
4 tenuibus hyalinis enerviis latis obtusissimis erosis vel fimbriatis. Herbs perennes, viscoso- 
pubescentes, macrocephale, alternifolie ; caule florifero sub-aphyllo; floribus flavis. 
H. CALIFORKICA (Torr. & Gray): elata; caule vel pedunculo 3-7-cephalo ; involucri squamis 
linearibus apice attenuatis; floribus aureis ; ligulis sæpe filamentis sterilibus instructis ; рарр! 
paleis cuneato-rotundis apice truncato eroso-denticulatis.—Mountains east of San Diego, Сай- 
fornia, in bushy places, June; Parry. A portion of the inflorescence was alone gathered of this 
interesting plant, apparently a branch of a tall herb, with the alternate leaves reduced to ovate- 
lanceolate and sessile bracts, of about half an inch in length. The paniculate or subcorymbose 
heads are about as large as those of Arnica montana. Ligules half an inch long.  Disk-flowers 
perhaps 100. Achenia 3 lines long, blackish, minutely striate on each face, also villous (but 
much more so on the margins) with long and thick hairs. Pappus of four nearly equal, thin, 
and hyaline palez, of less than a line in length, much shorter than the tube of the corolla. 
Foliage, etc., unknown. The genus is dedicated to G. W. Hulse, M. D., of Louisiana, late а 
surgeon of the United States army, and a zealous cultivator of botany, to whom we are indebted 
for many interesting plants of Florida, California, etc. Since its establishment upon a single 
and incomplete specimen, a second species has been detected by Dr. Newberry (H. nana, Gray in 
Pacific В. В. Report, 6, р. 16, t. 13,) confirming the genus. The broad and flat receptacle and 
the elongated compressed achenia are remarkable in the Heleniez, subdiv, Euhelenies, to 
which the genus is to be referred. 
HELENIUM AUTUMNALE, Linn. Texas ; west to the San Pedro; Bigelow. 
HELENIUM PUBERULUM, DC. Prodr. 5, p. 667; Torr. & Gray, Fl. 2, p. 385. California ; not 
uncommon. Rio Fronteras, Sonora; Thurber. 
HELENIUM TENUIFOLIUM, Nutt.; Torr. & Gray, l. с. Sonora; Capt. Smith. 
HELENIUM MICROCEPHALUM, РС. 1. c. Sandy moist places, Presidio del Norte, Van Horne’s 
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