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 Helianih.-Verhesin. — 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 

 connatis vel liberis. Styli florum disci rami lineares elongati hirti 

 appendice lineari-oblonga hirta muniti. Achaenia radii trigona 

 abortiva; disci subglabra valde incrassata subquadrangularia (attamen 

 a latere plus minusve compressa) in angulis submarginata. Pappus 

 ex aristis 2 interdum basi profunde laceratis tenuibus vel subpaleaceis 

 persistentibus interdum ad dentes reductis et squamellis numerosis 

 minutis intermediis compositus. — Herbae perennes e radice tuberi- 

 formi horizontali submoniliformi. Caulis tenuis simplex 1-3-cephalus 

 foliosus 3^-pedalis. Folia linearia alterna (paucis inferioribus 

 oppositis exceptis) Integra 1-nervia paullum revoluta plus minusve 

 tuberculato-strigosa. Capitula magna flava. Flores radii 10-20 

 poUicares et ultra; disci numerosi.^ — Species typica Hclianthdhi 

 grandijiora Torr. & Gray. — Helianthus L. subgen. Pseudo-helianthus 

 Gray, Syn. Fl. i. pt. 2. 285 (1884). 



1. Phoebanthus grandiflorus (Torr. & Gray) Blake, n. comb. — 

 Helianthella grandiflora Torr. & Gray, Fl. N. Am. ii. 333 (1842). 



2. Phoebanthus tenuifolius (Torr. & Gray) Blake, n. comb. — 

 Helianthella tenuifolia Torr. & Gray, Fl. N. Am. ii. 333 (1842). 



The two species of Phoebanthus ($oT/3os, Phoebus, the sun, and 

 apOos, floiver) 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 



