392 SMALL: PLANT NOVELTIES FROM FLORIDA 
Y LITRISA Small, gen. nov. Perennial caulescent herb, the 
rootstock freely branching and bearing rosettes of leaves on 
stout caudices from which the flower stems arise. Leaves 
alternate, the basal ones larger than the cauline; blades fleshy- 
leathery, becoming parchment-like, entire, parallel- veined. 
Heads corymbose. Involucre campanulate, few-flowered; bracts 
few, relatively broad, pubescent. Receptacle slightly ‘chafty. 
Corolla purplish, with a short tube and a cylindric throat. 
Androecium included. etic wuasetataes ovate, entire, obtuse. 
Achene cuneate, ribbed. Pappus of many barbellate bristles — 
(Generic name an anagram of Trilisa, the species of which the 
plant under consideration somewhat resembles in ha it.) 
The prairies of Florida, like the dunes of the lake region, 
harbor various endemic species of flowering plants. There is 
one composite herb that is prominent during the summer and 
fall, by a shade of purple in the inflorescence that is not dupli- 
cated in the flora. During the rest of the year it shows itself 
only by rosettes of fleshy or parcl t-like leaves. 
Litrisa is a member of the Eupatorieae of the Carduaceae. 
Its morphological associates are the genera of the group known 
best by the genus Laciniaria. Technically it is most closely 
related on the one hand to Trilisa, by its involucre, and on the 
other, to Carphephorus, by its chaffy receptacle. 
trisa carnosa Small, sp. nov. Stem 3-8 dm. tall, finely 
pubescent; basal leaves in a rosette; blades mostly 2-8 cm. long 
inear, varying to lanceolate or spatulate, acute; aulion ove 
remote; blades sessile; involucres erect; bracts mostly acute or 
sate the outer ie the inner elliptic or erg linear, 
about 4 mm. long; achenes 2-2.5 mm. lon ng, pubescent.—Low 
pinelands ee prairies, se a peninsular Florida. 
The type specimens were collected by the writer on the 
Istokpoga Prairie, east of Lake Istokpoga, Florida, August 31, 
1922, number 10658. 
’ AMMOPURSUS. Small, gen. nov. Perennial succulent 
herb, ao stem from a long, oe fleshy root, simple or 
bran . Leaves alternate, fleshy; blades narrow, pa Me 
ames sessile. Heads solitary: or in panicles, showy, not 
ct. Invo , many-flowered ; 
bracts broad, in = or more series, appressed, fimbriolate- 
ciliate. Receptacle naked, honey-combed. Flowers perfect. 
Corolla rose-purple; tube slender-cylindric; throat thicker than 
the tube, more or less urceolate; limb slightly zygomorphic, 
the lobes 5, spreading, about as long as the throat. Stamens 
