Dioecious trees to 4 m tall; bark glabrous, orange-yellowish, exfoliating in papery strips as stems thicken; trunk straight but branching tortuous, wood pithy and soft, young stems puberulent with short trichomes; dioecious, exceptionally some male flowers with functional pistils; leaves imparipinnate, produced from brachyblasts
, growing gradually during the season, 3-3.
Shrubs; leaves alternate, more or less evenly distributed along the stem or clustered on brachyblasts
(short shoots) Pertya 22b.
They are succulent plants with reduced leaves, spines (making the scrub absolutely impenetrable), and brachyblasts
(short vegetative shoots with closely spaced leaves), in addition to the thickened stems-all adaptations to store water or reduce water losses.
From the Greek brachys, short, and klados, branch, with reference to the short shoots or brachyblasts.
Shrubs stout to cushion-like, with brachyblasts and macroblasts.
Capitulescences monocephalous, terminal or axillar; capitula sessile on the brachyblasts, homogamous, ligulate, five- to seven-flowered; receptacle epaleate; involucre uniseriate, phyllaries ca.
Capitulescences monocephalous, capitula terminal on the brachyblasts to paniculate; capitula pedunculate, homogamous, ligulate, one-, three- to 16-flowered; receptacle epaleate; involucre multiseriate.
Herbs perennial, subshrubs or shrubs, sometimes cushion-like, frequently with brachyblasts and macroblasts.
Shrubs or little trees, erect or scandent, some branches modified in thorns to unarmed, stems with brachyblasts and macroblasts.
with different leaves: 0, absent; 1, present.
A simple example of these is brachyblasts or short shoots.
In this case brachyblasts form in the leaf axils, with some or all formation of the unit inflorescences taking place on these short shoots.