58 OKJJKU 20. POKTL'LACACEJE. 



4 1*. Baldwin!! C'lmpm. Diffusely branched, procumbent; leaves linear-lanceolate 



very acute, all opposite ; flowers longer than the setaceous stipules, mostly terminnl 

 stalked ; stam. 5. Dry fields, Fla. Ga. 6 W. Lvs. few. July Oct. 



5 P. Canadensis. Stem erect, slender, pubescent, many times forked, with slendei 



or capillary branches ; Ivs. lanceolate, the ratnial alternate : style none; utricle equal- 

 ling the sepals, (i) Woody hills. 



/3. puinila. Dwarf (240, tufted ; fls. closely sessile ; style as long as ovary, forked 

 at apex. Dry hills, Md. (Mr. Shriver.) 



16. SIPHONYCHIA, Torr. and Gr. (2i<pwv, a tube; that is, Anycliia 

 with a tubular calyx.) Sep. linear, petaloid above, coherent into a tube 

 below, unajuied. Pet. 5 sette alternate with the stamens on the throat of 

 the calyx. Style filiform, minutely bifid ; utricle included. @ Diffuse and 

 widely spreading. Fls. in glomerate, terminal cymes, white. Jn. Oct. 

 Calyx tube bristly with hooked hairs. Stems prostrate, diffuse ............ Nos. 1, % 



Calyx smooth or merely pubescent. Stems erect ......................... Nos. 3, 4 



\ S. Americana T. & G. Sts. pubescent in lines ; Ivs. lanceolate; *ep. rounded, in- 

 curved at apex ; fls. solitary and clustered. (T) S. Car. to Fla. 1 2f. LVB. email. 



2 S. dill'iisa Chapm. Pubescent; Ivu. lanceolate, obtuse; sep. linear, mucronate ; fl*. 



in dense cymes. (T) Pine-barrens, Fla. If. 



3 S. erecta Chapm. Sts. smooth, rigidly erect, subsimple ; Ivs. linear ; sep. lanceolate. 



tube smooth, furrowed. 11 Sands, Fla. 012'. 



4 S. Rugelli Chapm. Erect, diehotomous, pubescent : lvf. oblanceolate ; sep. conspic- 



uously mucronate, the tube hairy. E. Fla. If. (Paronychia, Shutt.) 



17. SCLERANTHUS, L. KNAWEL. (S^AT/pd?, hard, a^SoS; tho 

 calyx hardens in fruit.) Sep. 5, united below into a tube contracted at the 

 orifice. Pet. 0. Sta. 10, rarely 5 or 2. Styles 2, distinct. Utricle very 

 smooth, enclosed in the hardened calyx tube. A prostrate, diffuse little 

 weed, exstipulate. 



B. anninis L. Dry fields and roadsides, N. and M. 86'. Lvs. linear, acute, short, 

 partially united at their bases. Fls. very small, green, in axillary fascicles. July. 



18. MOLLUGO, L. CARPET-WEED. Calyx of 5 sepals, inferior, united 

 at base, colored inside. Cor. 0. Sta. 5, sometimes 3 or 10. Fil setaceous, 

 shorter than and opposite to the sepals. Anth. simple. Caps. 3-celled, 3 

 valved, many-seeded. Seeds reniform. Lvs. at length apparently verticil- 

 late, being clustered in the axils. 



91. verticillata L. Lvs. cuneiform, acute; at. prostrate, branched; pedicels 1-flow- 

 *red, subumbellate ; sta. mostly but 3. Dry fields. 6 KX. White. 



ORDER XX. PORTULACACE^E PURSLANES. 



Herbs succulent or fleshy, with entire leaves, no stipules, and rpgulai 

 flowers. Sepals 2, united at base. Petals 5, more or less imbricated. Sta- 

 mens variable in number, but opposite the petals when as many. Ovaries 

 free, 1-celled. Styles several, stigmatous along the inner surface. Fruit a 

 pyxis, dehiscing by a lid, or a capsule, loculicidal, with as many valvef ap 

 stigmas. Seeds with a coiled embryo. Figs. 122, 123. 



