m 
new Genera of Composita. 11t 
2 
ANISOCOMA. Torr. & Gray, ined. 
Composite-Cichoracew : Subtribe Scorzoneres. 
Capitulum pluriflorum. Involucrum cylindraceum ; squamis 
subscariosis adpressis obtusis; interioribus 5-7 lineari-oblongis 
subzqualibus; exterioribus 4-6 multo brevioribus, subrotundis, 
, imbricatis et quasi. calyculatis. Receptaculum planum, squa- 
mellis nonnullis piliformibus inter flores exteriores onustum. 
Achenia turbinato-fusiformia, sericeo-pilosa, erostria. Pap- 
pus duplex; exterior coroniformis, crenulatus, persistens ; in- 
terior e setis denis rigidulis uniserialibus, basi nudis, supra 
medium plumosis constans, decidua, inequalis; nempe 
setis 5 corollam subeequantibus, et 5 alternantibus iisdem 
dimidio brevioribus. — Herba annua (biennisve?) glabra, 
acaulis ; foliis. radicalibus linearibus pinnatifidis, lobis brevi- 
bus, hine inde mucronato-denticulatis. Scapi simplices, 
nudi, spithamzei, monocephali, foliis multo longiores. Capitu- 
um unciale. Flores lutei: pappus niveus.. 
A. acavLIS, Torr. & Gray. (Tab. XIH. Fig. 7—11.) 
The single specimen of this plant from which our figure is 
taken, Was not accompanied by any ticket or number, by 
which its particular habitat may be ascertained. à 
n conclusion, I have to offer my thanks to Mr. Isaac 
Sprague for the drawings which illustrate this brief paper. 
EXPLANATION OF TAB. XIIL 
Fig.1. Monopiilo S6 Paene : aM aud 
sulco Mo n bellidiformis, of the natural size. 2. The receptacle a 
deflexed irole. 3. A ray-flower. 4. A disk-flower. 5. Style from a disk- 
the a, 6. An achenium, crowned with the exterior coroniform pappus, and with 
meeeg inner pappus of a solitary plumose bristle, All but fig. 1, are variously . 
dut 7. Anisocoma acaulis, of the natural size. 8. Two of the setaceous pales 
sue. - 9. A separate flower, with the pappus. 10. An achenium, with 
bristle, or coroniform pappus. 11. One of the larger and I 
of the inner Pappus. All but fig. 7 are magnified. 
