80 NYCTAGINACEAE 



Flowers solitary in the involucre, on short slender pedicels ; fruit nearly glabrous. 



7. A. glabra. 

 Flowers 2-3 in the Involucres, subsessile; fruit decidedly pubescent. 



Lower leaves ovate, rounded at the base. 8. A. sessilifolia. 



Lower leaves lanceolate to linear, tapering at the base. 



Leaves of the cymes much reduced and bract-like; upper portion of the 



stem densely and finely puberulent. 9. A. bracteata. 



Leaves of the cymes neither much reduced nor bract-like. 



Leaves erect or ascending; lobes of the involucre rounded or broadly 

 triangular-ovate. 

 Plant prostrate or diffuse; involucres and branches of the mflor- 



escence densely viscid-hairy. 10. A. diffusa. 



Plants more simple, erect or ascending; branches of the inflorescence 

 usually merely viscid-puberulent. 

 Leaves from ovate- or obovate- to linear-lanceolate, usually 



over 5 mm. wide. _ 11. A. decumpens. 



Leaves narrowly linear, less than 5 mm. wide. 12. A. linearis. 

 Leaves divergent, distinctly petioled; lobes of the Involucre elliptic or 

 oval. 13. A. divaricata. 



9. WEDELIELLA Coekerell. l. W. incamata. 



Family 41. TETRAGONIACEAE. Carpet-weed Family. 



Hypanthium wanting; capsule loculicidal; leaves whorled. 1. Mollugo. 



Hypanthium manifest; capsule circumscissile; leaves opposite. 2. Sesitvidm. 



1. MOLLUGO L. Indian Chickweed, Carpet-weed. l. M. verticillata. 



2. SESUVIUM L. Sea Purslane. l. S. sessile. 



Family 42. PORTULACACEAE. Purslane Family. 



Ovary wholly superior. 



Styles or stigmas 3-8; sepals not accrescent; inflorescence not secund. 



Sepals deciduous, scarious; capsule 3-valved; plant with fleshy rootstock or root; 



ours with terete leaves. 1. Taijnum. 



Sepals persistent, at least In part herbaceous. 

 Capsule 3-valved; styles 3. 



Plants with a corm, or a fleshy root, crowned with a short caudex; cauline 



leaves opposite; ovules usually 6. 2. Claytonia. 



Plants annual, or perennial, with slender rootstocks; ovules usually 3. 

 Stem-leaves opposite. 



Stem-leaves a single pair; plant neither rooting at the nodes nor 



flagellifei-ous. 3. Limnia. 



Stem-leaves of several pairs; plant floating and rooting at the nodes, 

 usually flageUiferous. 4. CKUNOCALLIS. 



Stem-leaves alternate. 



Leaves very fleshy; perennials, withbulblets and creeping stems or 



stolons. 5. Naiocrene. 



Leaves not fleshy; erect annuals, without b alblets and stolons. 



6. MONTIASTRUM. 

 Capsule circumscissile near the base. 



Sepals 6-8; scape jointed above the middle, with 2 or more subulate bracts 



at the joint. 7. Lewisia. 



Sepals 2; scape not jointed near the middle. 



Plants with a thick perennial root, bearing one or several short caudices . 



8. Oreobroma. 

 Plants with a globular corm and a, slender stem bearing 2—3 verticil- 

 late leaves. 9. Eroc.\llis. 



Styles or stigmas 2; capsule 2-valved; sepals scarious and accrescent; inflorescence 

 secund. 10. Spragdea. 



Ovary partly inferior, circumscissile; ours low spreading leafy annuals, with flat leaves. 



11. PORTULACA. 



1. TALINUM Adans. Fame-flower. 



Plant scapose, from a corm-like rootstock. 



Flowers about 1 cm. wide; stamens 5-10. 1. T. parvifiorum. 



Flowers 2-3 cm. wide; stamens 30 or more. 2. T. calycinum. 



Plant low and spreading, from a branched rootstock ; flowers axillary. 3. T. brachypodum. 



2. CLAYTONIA (Gronov.) L. Spring Beauty, Ground-nut. 

 Plants with corms ; basal leaves few. 



Stem-leaves linear or narrowly lanceolate, l-ribbed or indistinctly 3-rlbbed. 



Corolla orange. 1. C. chrysantha. 



Corolla white or pink. 



Sepals oblong to oval, rounded at the apex ; corms usually with 1 or 2 stems. 

 Stem-leaves petioled ; corolla white, with rose-colored veins. 



2. C. virginica. 



