1CONES PLANTARUM. 1 
Puate 1101. 
PENTACHZETA GRACILIS, Benth. 
Compeosita, Tribe ASTEROIDE®. 
P. gracilis, Benth. sp. nov.; caule erecto stricto subcorymboso-ramoso, 
receptaculo convexo subconico, styli disci ramnis acutiusculis. 
Has. Mexico; gneiss rocks, near Juquila rrr ap ies at an elevation of 
4000 to 6500 ft., prov. Oaxaca, Galeotti, n. 2057; described from speci- 
mens in the herbarium of the Royal Museum, Brussels. 
Herba annua, erecta, subpedalis, ramis paucis gracilibus subfiliformibus, 
basi pilis crispis su lanata, superne glabra v. parce pilosula. lia a 
v. inferiora opposita, linearia v. ‘ifecionn lineari-lanceolata, acuta, integerrima 
v. rarius paucidentata, inferiora pollicaria, superiora minima angustissima. 
7 i ucrum \ate cam- 
panulatum, circa 2 lin. diametro, bracteis 2-seriatis subsequalibus angustis 
rigide carinatis margine anguste scariosis. Receptaculum convexo-conicum, 
nudum. Corolle 15-20, 1-seriate, ligula patente linea paullo longiore 
8-dentata; ¢ involucrum paullo superantes, limbo cylindraceo vix ampliato 
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apice pubescente brevissimeque 5-fido. Anthere basi obtuse, integre. 
Styli fl. 2 rami apice leviter complanati, in sspetines acutiusculas 
ducti, dors illosi. Achenia juniora linearia, olaee pappi setis 5 tenuis- 
simis cobbarboliie ima basi Ciovieiine dilatatis 
had some hesitation in referring this plant to Pentacheta, as ‘Ms style- 
seemed to connect it technically with scoops ; but on the whole it 
appears too nearly allied to P. aurea, Nutt., to be generically separated 
fro stb The latter may be technically distinguished by the following 
rhea —P. aurea, Nutt.; ramis — ———— receptaculo plano, 
styli disci ramis subulatis.—G. ‘Siem 
Fig. 1. Female ray-floret. 2. Summit of its style. 3. Disk-floret. 4. Three of the 
stamens. 5. Summit of the style. 6. Seta of the pappus. 
VOL. Il. THIRD SERIES. B 
