110 
2, Sedum. Parts of the flower each 4 to 7, with the stamens twice as many, and 
petals dstinet: low annual or perennial herbs, with cymose conspicuous flowers. 
3, Cotyledon. Parts of the flower in fives, with stamens 10, and petals somewhat 
united: stout perennial herbs, or fleshy-woody at base, with showy spicate or race- 
mose flowers. 
1. TILLAA L. 
Small slender somewhat succulent glabrous annuals, with opposite 
entire leaves, minute axillary white or reddish flowers, 3 to 5 sepals and 
petals and just as many stamens. 
1. T. Drummondii Torr. & Gray. Stems dichotomous and diffuse: leaves oblong- 
linear, rather obtuse, somewhat connate: flowers mostly solitary, on pedicels at 
length as long as the leaves: the reddish petals and obtuse carpels twice as long as 
the sepals.—In eastern Texas, and extending to Gillespie County. 
2. SEDUM L. (STONE-CROP.) 
Mostly perennial and glabrous herbs, with fleshy leaves, cymose and 
often secund flowers, 4 or 5 sepals and petals, the latter distinct and 
twice as many stamens. 
1. S. Torreyi Don. Branched from the base, ereet or decumbent, 5 to 10 em. high: 
leaves all scattered, oblong, about 4 mm. long: cyme compound, the flowers sessile, 
small, scattered along the circinate branches: petals yellow, lanceolate, acute, rather 
longer than the ovate sepals: styles short. (S. sparsiflorum Nutt. )—Extending from 
Arkansas to the upper Colorado and upper Guadalupe in Texas. 
2. §. Wrightii Gray. Stems diffusely spreading or at first erect: leaves few, thick- 
fleshy, obovate, or those of the flowering branches oblong, 6 to 8 mm. long: flowers 
very sbort-pedicelled, in a very compact, compound cyme: petals white, tinged with 
rose, spatulate, obtuse, and mucronate, twice as long as the oblong obtuse sepals,— 
Among rocks, from Devil’s River to the hills near El Paso. 
* §. Liebmannianum Hemsl. Low and branching, 5 to 7.5 cm, high: leaves 
fleshy, approximate or imbricate, ovate-oblong or elliptica), obtuse or rounded, 2 to 
4mm. long: flowers few and small at the summits of the branches, short-pedicelled : 
petals rosy-white, linear-lanceolate, mucronulate, dorsally-keeled, thrice longer than 
the oblong obtuse sepals.—A Mexican species, found in the Chisos Mountains of west- 
ern Texas (Havard). 
3. COTYLEDON L. 
Herbs, or soft-woody at base, with very thick and fleshy entire leaves 
(the lower rosulate), often large and showy spicate or racemose flowers, 
parts of the flower in fives, the petals more or less united, and 10 
stamens. 
1. C. strictiflora Baker, Radical leaves spatulate-lanceolate, cauline lanceolate 
and small, the similar floral ones shorter than the flower: flowers scarlet, 16mm. long, 
short-pedicelled, in a very strict and close secund raceme or spike, 15 to 20 cw. long: 
petals long attenuate-acuminate, much longer than the oblong sepals, (Hckeveria 
strictiflora Gray.)—Rocky cafions in the mountains west of the Pecos, 
HALORAGER. (WATER-MILFOIL FAMILY.) 
Aquatic or marsh plants, with the inconspicuous symmetrical flowers 
sessile in the axils of leaves or bracts, the calyx-tube coherent with the 
ovary, Which consists of 2 to 4 more or less united carpels, the styles or 
sessile stigmas distinct. 
