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the plant of our Mexiean border, which possibly should be kept distinct as M, 
Wrightiana Gray. In that case M. longiflora L. would disappear from our flora, 
Hemsley restricts it to southern Mexico, 
2. M. Jalapa L., the common “ four o’clock” of cultivation, is smooth, with short- 
stalked clustered many-cslored flowers, thickish calyx-tube only about 5 cm. long, 
and stamens shorter than the spreading border.—Credited to Texas by Hemsley. 
* * Involucre 3 to 6-flowered. 
3. M. multiflora Gray. Stout and spreading: leaves broadly ovate to ovate- 
lanceolate, often somewhat cordate at base, but decurrent on the petiole: involucre 
mostly 6-flowered, glabrous, campanulate: flowers pale rose-color to purple (tube 
somewhat greenish), 4 to 5 em, long: stamens 4 or 5: fruit marked toward the base 
by 10 shallow furrows and as many intermediate dark lines.—From the mountains 
east of E] Paso to Duval County. 
4. M. coccinea Benth. & Hook. Glabrous, with stems (3 to 5 dm. high) panicu- 
lately branched above: leaves narrowly linear, 5 to 7 cm. long, entire: involucre 
3-flowered, with acute segments: limb of the bright crimson calyx with notched 
lobes: stamens usually 3: fruit pubescent, deeply suleate between the stout ribs. 
(Oxybaphus coccineus Torr.)—Highlands between the Nueces and the San Pedro, 
2. ALLIONIA Lefl. (1758.) 
Herbs, with very large and thick perennial roots, opposite leaves, 
mostly clustered small flowers in a broad and open 5-lobed involucre, 
which becomes enlarged and reticulated in fruit, calyx with very short 
tube and bell-shaped (rose or purple) deciduous limb which is plaited 
in the bud, usually 3 stamens, filiform style, and fruit usually several- 
ribbed or angled. (Oxrybaphus Vahl, 1806.) 
* Fruit glabrous, usually tuberculate along the ribs (except in No. 3), and sometimes 
between them: involucre 1 to 5-flowered. 
1. A. corymbosa (Cav.) Kuntze. Glabrous, leaves cordate-acuminate, with sinu- 
ate margin; flowers terminal and crowded. (Oxybaphus glabrifolius Vahl.)—A South 
American and Mexican species, represented in Texas by var. TEXENSIS (var. nov.), 
in which the involucre is but 2 or 3-flowered.—Valleys near the Rio Grande, below 
I] Paso: 
2. A. aggregata(Vahl.)Spreng. Branches erect: leaves lanceolate, glabrous, short- 
petioled, with ciliate margin: peduncles solitary, axillary, villous, somewhat nod- 
ding. (Oxybaphus aggregatus Vahl, )—Prairies and mountains of Pecos and Presidio 
counties. 
3. A.oxybaphoides (Gray.) Kuntze. Stems slender, diffuse-procumbent: leaves all 
deeply cordate, on rather long petioles; the lowest reniform; the upper acuminate 
and sometimes subangulate: involucre 3-flowered and together with the loosely 
paniculate peduncles very viscid-glandular: fruit subglobose-ovoid, glabrous, desti- 
tute of ribs or angles. (Quamoclidion oxybaphoides Gray. Oxybaphus Wrightii Hems- 
ley.)—In the mountains near El Paso, and in northern Mexico, 
** Fruit pubescent: involucre always 3 to 5-flowered. 
4. A. nyctaginea Michx. Nearly smooth: stems repeatedly forked, 3 to 9 dm. 
high: leaves all petioled (except the uppermost reduced ones), from broadly ovate to 
lanceolate, rounded or cordate or cuneate at base: inflorescence loose and but slightly 
pubescent, the peduncles slender (at first solitary in the axils): involucre pubescent: 
fruit oblong-obovate, 4 mm. long, rather acutely angled (Orybaphus nyctaginens 
