FOUR-O'CLOCK FAMILY 259 



1. H. limosa (A. Nels.) Standi. A perennial with a woody base; stems 

 ascending 3-6 dm. high, nearly glabrous; leaf -blades thick, rounded-ovate to 

 cordate, 1-3 cm. long; involucres 4-6 mm. long; calyx rose-colored or purple, 

 campanulate, about 1 cm. high; fruit ovate, smooth, 3 mm. long. Mirabilis 

 glutinosa and M. limosa A. Nels, Dry hillsides: Utah— Ariz.— Calif.— Nev. 



Son, F-Je. 



7. ALLIONIELLA Rydb. 



Branched perennial herbs, with opposite pctioled leaves. Bracts five, united 

 into a gamophyllous viscid rotate involucre, which enlarges somewhat in fruit, 

 but does not become membranous. Flowers in each invohicre 3. Perianth 

 open, short funnelform, 5-lobed. Stamens 3, distinct. Fruit ellipsoid, neither 

 angled nor ribbed, very indistinctly tubercled, glabrous. 



1. A. oxybaphoides (A. Gray) Rydb. Perennial; stems diffusely branched, 

 procumbent; leaf-blades cordate, often somewhat acuminate, 2-5 cm. long, more 

 or less puberulent; involucre deeply 5-cleft, glandular-viscid, G nun. long; peri- 

 anth campanulate, 7-8 mm. long. Ravines and valleys: Tex.— Colo.— Ltah — 

 Ariz. Son. — Snbmont. Je-S. 



8. ALLIONIA Loefl. Umbrella-w^ort. 



Perennial herbs, with rather fleshy, entire, opposite leaves. Flowers perfect, 

 1-5 in each involucre, in ours rose-colored or white. Involucre gamophyllous, 

 5-lobed, in fruit enlarging and membranous. Perianth campanulate or funnel- 

 form, often oblique. Stamens 2-5, unequal; filaments very slender and united 

 at the base. Fruit club-shaped, 5-angled or 5-ribbed, usually pubescent and 

 minutely tuberculate. Pericarp adhering to the seed. Endosperm mealy. 

 [Oxyhaphus L'Her.] 



Leaves cordate to broadly ovate-lanceolate , an distinctly petioled. 



Leaf-blades cordate or deltoid. ^ 1- ^' nyctagtriea. 



Leaf-blades ovate, rounded or cuneate at the base. * ^+^ o ^ fl^rv^.,»^^ 



Stem glabrous; leaves thin and soft; inflorescence not bracteate. 2. A flortbunde. 

 Stem hirsute; leaves thick and fleshy: inflorescence bracteate. 3. A polyatncha. 

 Leaves ovate-lanceolate, oblong, or linear, sessile, or only the lower short-petioled. 

 Stem more or less hirsute as weU as viscid. 



^"''llav^Tva^^^ or broadly oblong, as well as the stem ^«"«P^^^^^^'>^^^^^^^ 



Leaves linear-lanceolate, almost glabrous; stem sparingly hirsute, or glabrous 

 except under the nodes. ^- q ^^^ruinr^^ 



Fruit glabrous. . .^ .. i * k^ o Carletonu 



Stpm e-lahroiis below not hirsute, viscid-puberulent above. , ^ . , , , 



Flowei^TolK in the involucre, on short slender pedicels ; fruU nearly^glabrous. 



Flowers 2-3 in the involucres, subsessile; fruit decidedlj' pubescent ,„„HroZm 

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



Lower leaves lanceolate to linear, tapermg at the base. 



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



stem densely and finely ptiberulent. u^.f la-o ^- ^'^°<^'^'''«- 



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



L-llves erect or ascendmg; lobes of the involucre rounded or broadly 



Plant '"pr^o'^trat^oi^diffuse: involucres and branches of the inflor- 



*«ir»<rnfp denselv viscid-hairy. 10- ^- aijjusa. 



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



usually merelv viscid-puberulent. 

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



over 5 mm. mde. .^ }},■ ^- decumbens. 



Leaves narrowlv Unear, less than 5 mm. w-ide. ,12. A. linearis 

 Leaves dhi?gent. distinctly petioled ; lobes of the involucre. eihptic or 



oval. 



1. A. nyctaginea Michx. Stems 3-10 dm. taU stout, dichotonioiisly 

 branched; leaf-blades 2-10 cm. long; inflorescence paniculate; myolucresm fruit 

 about 1.5 cm. broad, pubescent; lobes ovate or trian|ular; perianth red^ hairj, 

 without. Oxybaphm mjdagineus Sweet. Rich soil: bask.— ill.— La.— jn.m. 

 Wyo. Plain. My-Au. . 



2. A. floribunda (Choisy) Kuntze. Stems 3-9 dm. high stoutish, swollen 

 at the nodes; leaf-blades ovate to lanceolate, 2-5 cm. long; inflorescence pan.cu- 



