Part 3, 1918} ALLIONIACEAE 217 
wide, cordate or subcordate at the base, rounded at the apex, coriaceous, glandular-denticulate, 
sparsely scabrous on the upper surface with stout conic hairs having dark glandular bases, 
similarly pubescent beneath with longer hairs, glabrate in age; inflorescence paniculately much 
branched, the branches slender, naked, the flowers in axillary and terminal few-flowered 
clusters, on slender pedicels 2-4 mm. long; bracts ovate-oblong or lance-oblong, 2-3 mm. long, 
acuminate, scarious, glabrous, usually ciliolate; perianth 1 cm. long, the tube slender, long- 
villous, very abruptly expanded into a nearly rotate limb 1 cm. broad; stamens 5, short-exserted; 
fruit turbinate, 5 mm. long, conic above, glabrous. ' 
TYPE LOCALITY: Valley near Azufrora, Coahuila. 
DISTRIBUTION: Western Texas and Coahuila. 
3. Anulocaulis annulatus (Coville) Standley, Contr. U. S. Nat. 
Herb. 12: 375. 1909. 
Boerhaavia annulata Coville, Contr. U.S. Nat. Herb. 4: 177. 1893. 
Plants erect from a decumbent base, 5-10 dm. high, sparsely branched below, loosely 
paniculate above, the branches stout, glaucescent, at least below, glabrous except at the villous 
nodes; petioles stout, 2-4 cm. long; leaf-blades broadly oval to ovate-oval or ovate-deltoid, 
3-8 em. long, 2-6 cm. wide, subcordate or rounded at the base and subequal, rounded at the 
apex or rarely only obtuse, coriaceous, shallowly and irregularly repand-dentate, yellowish- 
green above and hirsute with slender hairs having dark enlarged glandular bases, paler beneath 
and densely hirsute with similar hairs; inflorescence nearly naked, the branches slender, the 
flowers in dense many-flowered headtike long-pedunculate umbels; bracts short, lanceolate, 
hirsute, the hairs with glandular bases; perianth 8 mm. long, greenish, the tube stout, long- 
villous, gradually dilated into a campanulate limb; stamens 3, short-exserted; fruit biturbinate, 
5 mm. long, glabrous. 
Types Locality: Furnace Creek Canyon, Funeral Mountains, Inyo County, California. 
DIstRIBUTION: Inyo County, California. 
ILLUSTRATION: Contr. U. S. Nat. Herb. 4: pl. 18. 
20. ALLIONIA L,. Syst. Nat. ed. 10. 890. 1759. 
Vitmania Turra; Cav. Ic. 3: 53. 1794. Not Vitmannia Vahl, 1794. 
Oxybaphus 1/7 Hér.; Willd. Sp. Pl. 1: 185. 1797. 
Calyxhymenia Ortega, Dec. 5. 1797. 
Calymenia Pers. Syn. Pi. 1: 36. 1805. 
Perennial plants, herbaceous or rarely suffruticose, erect or procumbent, viscid-pubescent 
or glabrous, usually branched, the branches somewhat swollen at the nodes. Leaves opposite, 
sessile or petiolate, the blades entire or undulate, often asymmetric. Flowers perfect, in- 
volucrate, the involucre 1-3-flowered, equally or unequally 5-lobed, in fruit more or less 
accrescent, often nearly rotate in age and reticulate-veined; perianth campanulate or broadly 
short-funnelform, usually oblique, the tube usually very short, constricted above the ovary, 
the limb 5-lobed, the lobes induplicate-valvate, emarginate, the perianth deciduous after 
anthesis. Stamens 3-5; filaments capillary, unequal, circinnate, short-connate at the base, 
usually exserted; anthers didymous. Ovary ovoid or subglobose; style filiform; stigma long- 
papillose. Anthocarp obovoid, usually 5-angulate or 5-sulcate, almost terete, rugose or 
tuberculate, or the angles smooth, constricted at the base, glabrous or pubescent, mucilaginous 
when wet. Seed adherent to the pericarp; embryo uncinate, the cotyledons enclosing the 
copious endosperm; radicle exterior, elongate, descending. 
Type species, Allionia violacea L. 
Fruit glabrous. . aus 
Angles of the fruit covered with coarse, distinct tubercles. : 
Stems densely viscid-pilose below. 1. A. viscosa. 
Stems glabrous up to the inflorescence. 
Involucres in fruit 6-10 mm. long; blades of the lower leaves 
usually broadly cordate-deltoid, twice as Jong as broad or 
shorter. 2. A. corymbosa. 
Involucres in fruit 4-6 mm. long; blades of the lower leaves 
elongate deltoid-lanceolate, three times as long as broad or : 
longer. 3. A. microchlamydea, 
