520 BLAKE. 
Viguiera leptocaulis, the type of which (Pringle 2247, from near Mon- 
terey) was examined at the Gray Herbarium by the writer some 
months ago, in its involucre, wholly deciduous pappus, and general 
habit agrees much better with the genus to which it is here referred 
than with that in which it was originally placed. It seems quite 
distinct from any described Mexican Helianthus. 
Phoebanthus Blake, n. genus Helianth.-Verbesin. — Capitula 
heterogama radiata, floribus radii 1-seriatis neutralibus disci herma- 
phroditis fertilibus. Involucrum hemisphaericum, bracteis 3-seriatis 
vix gradatis eis duarum serierum exteriorum lineari-lanceolatis acumin- 
atis infra valde induratis costatis supra appendice herbacea laxa multo 
longiore praeditis sparse tuberculati-hispidis eis seriei intimae latiori- 
bus brevioribus solummodo acutis apice obscurissime subherbaceis 
appressis flores radii subtendentibus. Receptaculum convexum, 
paleis complicatis flores disci amplectentibus. Corollae radii ligulatae 
patentes anguste oblongae apice 2-3-denticulatae; disci regulares 
tubulosae, tubo brevi faucibus elongatis cylindraceis apice breviter 
5-fidae. Antherae basi valde sagittatae apice appendice ovali vel 
oblongo-ovata obtusa munitae, filamentis vel in tubum clausum 
ghee 23 vel liberis. Styli florum disci rami lineares elongati hirti 
appendice lineari-oblonga hirta muniti. Achaenia radii trigona 
abortiva; disci subglabra valde i ta subquadrangularia 
a latere plus minusve compressa) in angulis submarginata. Pappus 
ex aristis 2 interdum basi profunde laceratis tenuibus vel subpaleacets 
persistentibus interdum ad dentes reductis et squamellis numerosis 
minutis intermediis compositus.— Herbae perennes e radice tuberl- 
formi horizontali submoniliformi. Caulis tenuis simplex 1-3-cephalus 
foliosus 3—4-pedalis. Folia linearia alterna (paucis inferioribus 
oppositis exceptis) integra I-nervia paullum revoluta plus minusve 
tuberculato-strigosa. Capitula magna flava. Flores radii 10-20 
pollicares et ultra; disci numerosi.— Species typica Helianthella 
grandiflora Torr. & Gray.— Helianthus L. subgen. Pseudo-helianthus 
Gray, Syn. FI. i. pt. 2. 285 (1884). 
1. PHoEBANTHUs grandiflorus (Torr. & Gray) Blake, n. comb.— 
Helianthella grandiflora Torr. & Gray, Fl. N. Am. ii. 333 (1842). 
2. PHorBantuus tenuifolius (Torr. & Gray) Blake, n. comb.— 
Helianthella tenuifolia Torr. & Gray, Fl. N. Am. ii. 333 (1842). 
The two species of Phoebanthus (@otBos, Phoebus, the sun, and 
&vOos, flower) form a small group very similar to Helianthus in habital 
characters, but technically more closely allied to Helianthella. From 
the former Phoebanthus differs sufficiently in the numerous short 
