ROBINSON AND GREENMAN. — GENUS MIKANIA. Tk 
puberulent or glabrous. Pappus of many sete in a single row, mostly 
about equalling or somewhat exceeding the achene, bright white or more 
commonly sordid, fuscous, or rufous. — Spec. iii. 1742; DC. Prodr. 
v. 187, vii. 270; Benth. & Hook. f. Gen. ii. 246; Hoffim. in Engl. & 
Prantl, Nat. Pflanzenf. iv. Ab. 5,140. Willugbeya, Neck. Elem. i. 82. 
Corymanthelium, Kunze, Linnzea, xx. 19.— Mostly slender shrubby or 
herbaceous twiners or “ rarely erect.” Leaves opposite, usually ovate, 
cordate or hastate, and petiolate. Inflorescence spicately, racemosely, 
or corymbosely paniculate. A genus of some 175 good species nearly 
confined to Tropical or Subtropical America. MM. scandens is also — 
Widely distributed in the United States and in the warmer parts of the 
Old World. 
Subgenus 1. CytinpRoxeris. Truncate scales of the involucre not 
at all imbricated but strongly involute, each completely surrounding a 
ower, 
- M. globosa, Coulter. Glabrous or nearly so: leaves ovate, 
thickish, undulate-dentate, acuminate, rounded at the base, 5-nerved from 
_— the base: heads in dense globose clusters; these in lateral or ter- 
minal panicles: each of the four flowers completely enveloped in an 
Mvolucral scale : mature achenes not seen. — Bot. Gaz. xx. 46, where 
also called Willugbeya globosa. — Santa Rosa, Guatemala, altitude 4,000 
feet, Heyde § Luz (no. 3430 of Donnell Smith’s sets). A noteworthy 
Species differing much in its involucral scales from any other known to 
> It is said by Professor Coulter to resemble closely MZ. smilacina in 
habit and structure.” The likeness, however, does not extend to the 
heads, which are here completely divided into four compartments by the 
intrusion of the involute edges of the scales; while in JZ smilacina the 
'nvolucre is normally imbricated. 
Subgenus 2. Imsricat#. Scales of the involucre imbricated. 
_ 31. Heads spicately or racemosely arranged on the opposite spread- 
ng branches of ample pyramidal panicles. 
* Heads pedicelled. 
®. M. Houstonis, Willd. Glabrous climbing shrub, with ovate 
*cuminate entire petiolate leaves. — Spee. iii. 1742; DC. Prodr. v. 190. 
i Mexico, Vera Cruz, Houston, and (acc. to Hemsl.) “ Linden, no. 
3 Yucatan and Tabasco, Johnson, no. 25; Guatemala, Las Esca- 
sige Hartweg, no. 535 ; Chojoja, near Mazatenango, Bernoulli, no. 100; 
a Barbacoas, S. Hayes.” The only plants in Herb. Gray agreeing 
the character of this species are Ervendberg’s nos. 87, 222, from 
“ttenberg, Huasteca, Mexico. . 
