30 
Texas, from the Gulf to New Mexico. Blooming from early spring until late fall. 
Quite variable in size, some of thé forms from the mountain region of western Texas 
being very small. 
4. ARENARIA L. (SANDWORT.) 
Low tufted herbs, with no stipules, white solitary or cymosely-pani- 
cled flowers, 4 or 5 sepals, 1 to 5 entire petals (or none), 10 stamens, 3 
styles, and a globose or short-oblong few to many-seeded pod, which 
is dehiscent into 3 entire, 2-cleft, or 2-parted valves. 
* Leaves lanceolate or linear-oblong, cuspidate-acute, punctate under a lens. 
1. A. alsinoides Willd. Downy: stems prostrate, elongated (becoming some- 
times several feet long), much branched: leaves lanceolate, attenuate at base: 
peduncles solitary, axillary, 1-flowered, longer than the leaves, reflexed in fruit: 
petals none or 1 to 5, about equaling the sepals or shorter: seeds smooth. (A. diffusa 
Ell. A. lanuginosa Rohrb,)—A species of the South Atlantic States and Mexico, 
and reported from Gillespie county. Doubtless to be found quite widely distributed 
in Texas. Very variable, sometimes developing a diffuse dichotomous inflorescence. 
2». A. Benthamii Fenzl. Nearly glabrous, branched from the base: stems slender, 
short, few-tlowered: leaves linear-oblong, much shorter than the internodes, the 
lowest spatulate, attenuate at base: petals shorter than the sepals: seeds tubercu- 
late.-—On rocky hills, central Texas, between the Brazos (just within our eastern 
limit) and the Rio Grande, 
** Leaves small, rigid, awl-shaped or bristle-shaped. 
3. A. Michauxii Hook. f. Smooth, erect or usually diffusely spreading: leaves 
with many others clustered in the axils: cyme diffuse, naked, many-flowered: petals 
twice as long as the rigid, pointed, ovate, 3-ribbed sepals. (A, stricta Michx.).—A 
dry or rocky ground species of the Atlantic States and Mexico, and reported from 
Comanche’s Peak (Reverchon). 
5. TISSA Adans. (SAND SPURRFY.) 
Low herbs, mostly on or near the sea-coast, with filiform or linear 
somewhat fleshy leaves (smaller ones often clustered in the axils), 
scaly-nembranaceous stipules, 5 sepals, 5 entire petals, 2 to 10 stamens, 
3 styles, and a 3-valved pod.—A genus variously known as BUDA 
Adans., SPERGULARIA Presl, and LEPIGONUM Wahlb. Ours are 
fibrous-rooted annuals. The following is Dr. N. L. Britton’s prelimi- 
nary arrangement: 
* Species of the sea-beaches or salt-marshes or borders of salt lakes: leaves very fleshy: 
petals pink, 
1. T. marina Britton. Stout, erect or ascending, smooth or glandular-pubescent : 
leaves very fleshy, often much clustered in the axils: pedicels short: capsule 5 to 
8mm. long at maturity: seeds smooth or rongh.—Aloug the whole coast, and pre- 
sumably to be found along the Texan coast. 
** Species of non-saline distribution. 
2, T. diandra Britton. Glandular-pubescent, spreading or bushy branched from 
the base: stipules ovate, acute: peduncles leafless or nearly so: petals pink.—Gal- 
veston, and the Rio Brazos. 
3. T. gracilis Britton. Plants small and delicate, 4 to 8 cm. high: petals none: 
pods 2 to 4 mm. long, slightly exceeding the calyx: seeds tuberculate.—Wet sands 
near Dallas, 
