STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 347 
densely soft-pubescent; fruit clavate, minutely strigose, rather obtuse above, 4 
or 5 mm. long. 
This is not likely to be confused with any species except A. pachyphylla, 
It is distinguished from that species by its larger leaves and hirsute pubes- 
cence; the stem, too, is less branched. Type in the herbarium of the University 
of California (no. 101182) collected at Canyon City, Colo,, August 13, 1872, 
Brandegee 437. In the sume herbarium there is a second specimen collected in 
the same locality, July 28, 1878, Brandegee, 702. 
19. Allionia viscosa (Cayv.) Kuntze, Rev. Gen. Pl. 533. 1891. 
Mirabilis viscosa Cay. Ic, Pl. 1: 18. 1791. 
Calyrhymenia viscosa Ortega, Nov. Rar, Pl. Hort, Matr. 1:6, 1797, 
Calymenia viscosa Pers. Syn. 1:36. 1805. 
Vitmania viscosa Turra; Steud. Nom. 140, 1821, as synonym. 
Oxrybaphus viscosus 1/Her,; Choisy in DC. Prod, 13°: 480, 1849. 
Specimens cramined: 
Mexico: Near Tehuacan, Puebla, Pringle S600; Ixmiquilpan, Hidalgo, 1905, 
Purpus 1485; near Tula, Widalgo, 1902, Pringle; Tehuacan, 1841, 
Licbmann, 
20. Allionia rotata Standley, sp. nov. 
Plant probably tall (there are only the ends of branches upon the sheets) ; 
stems sparingly puberulent throughout but not viscid, almost glabrous below, 
sparingly branched, the branching mostly dichotomous; leaf blades ovate, 
obtuse, cordate at the base, glabrous or the uppermost more or less puberulent ; 
petioles very short, the uppermost leaves sessile; inflorescence subcymose, its 
branches slender and covered with much reduced, bract-like leaves; involucres 
on slender pedicels 7 mm. long or less, when mature circular in outline or 
scarcely lobed, sparingly soft-puberulent, about 25 mm. in diameter, ciliolate; 
fruit 4 mm, long, much narrowed below, obtuse above, 5-ribbed, prominently 
transversely ridged or tuberculate, glabrous or minutely puberulent. 
From A. viscosa the plant is distinguished by its less pubescent and not 
viscid stems and leaves, shorter petioles, alternate branching, and more tubercu- 
Inte fruit. The plant has also 2 or 3 flowers and fruits in each involucre while 
A. viscosa has uniformly only one. Type in the herbarium of the Missouri 
Botanical Garden, collected at Azufrora near Saltillo, Mexico, September 22, 
1848, Gregg 511. 
21. Allionia coahuilensis Standley, sp. nov. 
Stems stout, erect, about 1 meter high, pale below, darker above, with more 
or less abundant, short, soft pubescence below which becomes more dense above: 
leaf blades lanceolate, 50 mm. long and 17 mm. wide or less, cuneate or rounded 
at the base, blunt-pointed, of medium thickness, densely soft-pubescent on both 
surfaces, the margins irregular, all leaves except those of the inflorescence 
with conspicuous petioles 20 mni. long or less; inflorescence paniculaite, its 
branches stout, opposite, very densely viscid-pubescent throughout, the hairs 
‘ather long and spreading; branches of the inflorescence with conspicuous. 
much-reduced, bract-like leaves, these 5 mm. long or less, ovate, densely viscid- 
pubescent ; involucres 12 mm. wide or less and about S min, high. glandular- 
villous, on short glandular-villous, often bracted pedicels; lobes of the involucre 
broadly ovate or orbicular, broadly obtuse, short; fruit 4 mmm. long, obtuse above, 
slightly narrowed below, with 5 smooth, rather prominent ribs, the spaces 
between them transversely rugulose and hirtellous, 
