2A-H; b) small size of spore body (33) 38 (45) gm; and c) the presence of several rows of marginal sterile polygonal areoles
The thin, circular areole
in the micropylar end of the sclerotesta
Boke (1941, 1951, 1952, 1953, 1955, 1956, 1957a, 1957b, 1959, 1961) studied the apical meristem and the development of areoles
and tubercles in various species of tribe Cacteae (e.
subcrenata by there being two or more free veins in costal areoles
In the female from Himmiste and the female from Keskvere, polygonal areoles
are clearly isolated from each other (Fig.
The young areoles
near the top of the plant bear cottony, wool tufts.
Nebraska records are near the northern edge of the range for this southern species that consists of closely aggregated, squamulose to lobate areoles
Cacti, by the way, are distinguished from other succulents by having areoles
Cactuses - which have spines or thorns growing out of regularly spaced areoles
- can be barrel-shaped, tall and branching, or irregularly shaped and close to the ground.
Serpocaulon is defined as having commonly anastomosing veins, chevron-shaped areoles
, 1-10 series of areoles
between the costa and pinnae margin, excurrent veinlets in the areoles
, as well as a generally long-creeping, branched rhizome, with peltate, clathrate rhizome scales (at least in the central or basal portion).
Pronotum with large, distinct, bulbous hood, cleft posteriorly to receive anterior portion of a compressed elevation formed by two greatly enlarged hemispherical lateral carinae; areoles
of hemelytra very large, rectangular, and vitreous Galeatus Curtis
The smallest areas outlined by veins, referred to as areoles
, may be described in terms of shape, size, orientation and presence or absence of freely ending veinlets.