CHICKWEED FAMILY 279 



1. S. saginoides (L.) Britton. Stem 2-10 cm. high, decumbent, often root- 

 ing; leaves fihform, 5-15 mm. long; pedicels 5-20 mm. long, often curved at the 

 summit; sepals oval, obtuse, 1.5-2 mm. long. S. Linnaei Presl. Wet places 

 among rocks: Greenl. — Que. — N.M. — Calif. — Alaska; Eurasia. Mont. — -Sub- 

 alp. Je-Au. 



2. S. nivalis Fries. Stems 1-3 cm. high; leaves subulate, 3-8 mm. (rarely 

 1 cm.) long; pedicels 3-10 mm. long, straight or nearly so; sepals broadly oval, 

 rounded, purple-edged, 2 mm. long. Wet places on the summits: Greenl. — 

 Lab. — -Alaska; Colo.; n Eur. Alp. Jl. 



3. S. occidentalis S. Wats. Stem 5-10 cm. high, branched near the base, 

 decimibent or ascending; leaves narrowly linear, acute; pedicels 15-25 mm. long; 

 calyx rounded at the base; sepals 5; capsule 3 mm. long. Low ground: B.C. — 

 Ida. — Calif. Suhmont. 



8. SPERGULA L. Spurry, Corn Spurry. 



Somewhat succulent annuals. Leaves whorled and commonly clustered, 

 thick, narrow, with stipules. Flowers in terminal cymes. Sepals 5, persistent. 

 Petals 5, white, entire. Stamens 10, rarely 5. Ovary 1-celled; styles 5. Cap- 

 sule 5-valved, the valves opposite the sepals. Seeds narrowly winged. 



1. S. arvensis L. Annual; stems slender, branched from the base, 1.5-5 

 dm. high; leaves linear-filiform, sparingly villous or glabrate, 3-5 cm. long; cymes 

 terminal, loose, many-flowered; pedicels reflexed in fruit; sepals ovate, 3-4 mm. 

 long; petals equalling or slightly exceeding the sepals. Cultivated grounds and 

 waste places: N.S. — -Fla. — Calif. — Alaska; adv. or nat. from Eu. Je-S. 



9. TISSA Adans. Sand Spurry. 



Low annual, biennial, or perennial herbs, usually rather succulent. Leaves 

 opposite, with stipules, often with secondary leaves fascicled in their axils. 

 Flowers in terminal, racemiform cymes. Sepals 5, persistent. Petals 5, rarely 

 fewer, or wanting, pink or whitish, entire. Stamens 2-10. Ovary 1-celled; 

 styles 3. Capsule 3-valved to the base. Seeds often margined, smooth or 

 tubercled. [Spergularia J. & C. Presl.] 



Stipules lanceolate or ovate-lanceolate, longer than broad. 1. T. rubra. 



Stipules broadly triangular, as broad as long or broader. 



Stipules triangular, about as long as broad; internodes of the stem much shorter than 



the leaves; seeds rough. 2. T. salina. 



Stipules very broadly triangular, almost twice as broad as long; middle internodes 

 about equalling the nodes; seeds smooth. 3. T. sparsi flora. 



1. T. rubra (L.) Britton. Annual or perennial; stem spreading, much 

 branched from the base, glabrous or more or less glandular above; leaves flat or 

 slightly grooved, hnear-filiform, 8-12 mm. long; stipules attenuate, 4-6 mm. 

 long; sepals oblong-lanceolate, scarious-margined, 3-4 mm. long; petals scarcely 

 equalUng the calyx. Spergularia rubra J. & C. Presl. Sandy soil and waste 

 places: Newf.— Va.— O.; Calif.— Mont.— B.C.; Eu. Plain. My-Au. 



2. T. salina (Presl.) Greene. Annual; stem usually diffuse, branched, more 

 or less pubescent, 1-2 dm. high; leaves linear-filiform, fleshy, terete, 1-4 cm. 

 long; sepals ovate, acutish or obtuse, 4-5 mm. long; petals pink, shorter than the 

 sepals. S. salina J. & C. Presl. T. marma Britton. Sahnesoil: N.B. — Fla. — • 

 Sask.; Alaska — Cahf. Ap-S. 



3. T. sparsiflora Greene. Annual; stems somewhat branched, ascending or 

 diffuse, glandular-pubescent; leaves linear-filiform, acute, 1-2.5 cm. long; sepals 

 ovate, obtusish, about 4 mm. long, glandular-pubescent; petals lilac. Sahne 

 soil: Mont.— Colo.— Nev.— B.C. Plain. My-S. 



10. LOEFLINGIA L. 



Small diffusely branched, glandular or glabrous annuals. Leaves subulate, 

 with stipules. Flowers solitary or fascicled in the axils. Sepals 5, rigid, keeled, 

 awn-pointed. Petals 2-5, minute, without claws, or wanting. Stamens 3-5, 



