Oedbb 22.— POBItJLAOACEiE. 263 



cauUne opposite, the raminal alternate ; 2 paira of scarious, subulate stipules at 

 each fork, which are shorter than the flower ; style none ; utricle equaling the 

 greenish sepals. — Hilly woods, Can. to Ga,, "W". to Ark. Hight 6 — 10 or 18', 

 often nearly smooth. Lvs. 4 — 10" long, somewhat stalked. Pis. J" long, some- 

 what pedicellate. Seed globular, rosin colored. Ja — Aug. (Queria, L. Anychia 

 oapillacea Nutt.) 

 13. PUMILA. Dwarf, a few inches (2 — 4') high, the lvs. reduced in proportion, 

 very pubescent ; stems short-jointed, tufted, fls. sessile, glomerate ; style as 

 long as the ovary (at least in specimens from Md. sent by Mr. H. Shriver), 

 forked at apex. (A. dichotoma DO.) 



17. SIPHONYCHIA, Torr. and Gr. (Gr. aicpuv, a tube, that is, Anychia 

 with a tubiilar calyx.) Sepals linear, petaloid above, coherent into a 

 tube below, unarmed ; petals 6 setse alternate with the stamens ; style 

 filiform, minutely bifid ; utricle included in the calyx. — (D Procumbent, 

 difi"use and widely spreading. Fls. in glomerate, terminal cymules. 



S. Americdna Torr. and Gr. — S. Car. to Pla. Sts. 1 — 2f in length. Lvs. 

 oblanceolate, much shorter than the intefnodes, 12 — 9 — 6" long, obtuse. Bracts, 

 like the lvs., very small. Fls. very numerous, 1" or more in length, with hooked 

 bristles below. Sep. white above. (Herniaria Nutt.) 



18. SCLERAHTHUS, L. Knawkl. (Gr. oKXrjpbg, hard, dvOog ; when 

 in fruit the floral envelope appears hard and dry.) Sepals 5, united 

 below into a tube contracted at the orifice ; petals ; stamens 10, 

 rarely 5 or 2 ; styles 2, distinct ; utricle very smooth, inclosed in the 

 hardened calyx tube. — (D A prostrate, diffuse little weed, exstipulate. 

 S. dnnuus L. Dry fields and roadsides, N. Eng. and Mid. States. Sts. numerous, 



. branching, decumbent, short (3 — 6'). Lvs. linear, acute, short, opposite, partially 

 united at their bases. Fls. very small, green, in axillary fesoioles. Jl. 



19. MOLLUGO, L. Caepet-weed. Calyx of 5 sepals, inferior, united 

 at base, colored inside ; corolla ; stamens 5, sometimes 3 or 10 ; fila- 

 ments setaceous, shorter than and opposite to the sepals ; anthers simple ; 

 capsule 3-celled, 3-valved, many-seeded ; seeds reniform. — Lvs. at length 

 apparently verticillate, being clustered in the axils. 



M. vertioillata L. Lvs. cuneiform, acute ; St. depressed, branched ; pedicels 

 1-flowered, subumbeUate ; sta. mostly but 3. — (D Dry places throughout N. 

 America. Sts. slender, jointed, branched, lying flat upon the ground, forming, a 

 roundish patch. At every joint is a cluster of wedge-shaped or spatulate lvs. of 

 unequal size, usually 5 in number, and a few flowers, each on a solitary stalk, 

 which is very slender, and shorter than the petioles. Fls. small, white. Jl. — Sept. 



Order XXII. POETULACACE^. Pukselanes. 

 fierfc succulent or fleshy, with entire leaves, no stipules, and regular flowers. 

 Sepals 2. united at base, rarely 3 or 5. Petals 5, sometimes more or less imbricated 

 in aestivation. Sta. variable in number, but opposite the petals when as many. 

 Ova. superior, 1-oelled. Sty., several, stigmatous along the inner surface. R. a 

 pyxis, dehiscing by a lid, or a capsule, loculicidal, with as many valves as stigmas. 

 Seeds few or many, on long funiculi from the base, or on free central placentse. 



Genera 2T, apeeiea 250, inhabiting dry places in every quarter of the wovld. They possess no 

 lemarlcable properties. 



SENEBA. 



gSepalsB. Petalsnone. Truitapyxis Sesutiitji. 1 



§ Sepals 2.— Stamens B, opposite the 5 petals Clattokia. 2 



—Stamens 7 to 30,— hypogynous, capsule S-valved Taiikitm. 8 



— perigynoua. Pyxis opening by a lid Poehtlaoa. 4 



