BLAKE.— SPECIES HERETOFORE REFERRED TO LEPTOSYNE. 345 
the young branches, 1—2-pinnatifid, 1.5—-2.5 em. long, ternately cut 
into short fleshy linear lobes, on petioles nearly as long; heads cy- 
mosely arranged in nearly naked panicles, as large as those of last 
species; achenes 4 mm. long, 2.5 mm. broad.— Acoma dissecta Benth. 
Bot. Voy. Sulph. 29, t. 17 (1844). Leptosyne dissecta Gray, Syn. FI. 
i. pt. 2. 301 (1884), as to synonym. UL. parthenioides var. dissecta 
Wats. Proc. Am. Acad. xxiv. 56 (1889), as to synonym only.— Ben- 
tham’s type came from Cape San Lucas. The only specimens ex- 
amined are three sheets from Magdalena Island, Lower CALIFORNIA, 
collected 12 Jan. 1889 by Brandegee (see Brandeg. Proc. Calif. Acad. 
ser. 2. ii. 176 (1889)). 
38. . DissEcTuS (Benth.) Blake var. longilobus Blake, n. var., 
foliis 5-7.5 em. longis pinnatiformibus, segmentis (8-5) lineari-fili- 
formibus, lobis inferioribus 2-3 cm. longis 3-5-lobatis; acheniis ut in 
forma typica sed margine crenulatis— Lower CALIFORNIA: Carmen 
Island, 1-7 Nov. 1890, Palmer 877 (TYPE SHEET in Gray Herb.; dis- 
tributed as L. dissecta Gray). 
STEPH IS Blake, n. genus Compositarum Coreopsi- 
_ dearum (orédavos crown, and ¢goXis scale). Capitula heterogama radi- 
ata, radiis fertilibus. Involucrum duplex squamis liberis, exterioribus 
5-6 herbaceis obtusis ovato-lanceolatis; interioribus circa 8 submem- 
branaceis pees be spipleraetee apice rotundatis margine. angusto 
eceptaculum conicum, 
paleis plants membranaceis flavis apice rotundatis. Radii corollae ca. 
12 ligulatae oblongae tridentatae supra albidae infra atroplumbeae 
glabrae obscure ca. 8-nervatae. Disci corollae flavae glabrae exan- 
nulatae 5-dentatae tubulo breve. Antherae basi subintegrae apice 
appendice deltoideo munitae. Styli rami apice incrassati. Achenia 
dimorpha: ea radii valde obcompressa ovalia glabra epapposa; disci 
paullo crassiora oblonga supra appresse pubescentia, pappo coro- 
niformi e squamis brevissimis inaequalibus lacerato-fimbriatis vix 
junctis ad angulos plus minusve exaggeratis composito.— Herbae 
perennes scaposae pratincolae radicibus fasciculatis caulibus a foliorum 
basibus fibrillosis persistentibus lanugine brunnea intermixta vestitis. 
Folia multa longa integra vel pinnatiformia. Scapi pauci nudi vel 
.1-2-bracteati capitula solitaria majuscula radiis albidis gerentes. 
Genus habitu pappo clinio conico bene distinguitur. Type species 
ptosyne pinnata Rob.— One species with a variety, in. mountain 
meadows of southern Mexico. 
