However, compared to other described Pisonia species, the anthocarp anatomy is somewhat different, as the fruits are not ribbed (slightly sulcate when immature) and lack glands or warts.
Anthocarp, diclesium, or fruit elliptic, 10-12 * 7-8 mm, rounded at base, finely velutinous, coriaceous, indehiscent, with several parallel longitudinal lines, suggesting ancestral ribs; each fruit one-seeded, seed pisiform, 6-7 mm in diameter, black.
Kaye (1999) discovered that removing the achene from the winged portion of the anthocarp and then subjecting the achene to alternating temperatures and photoperiods resulted in the highest percentage of germination.
each fertile anthocarp contains one achene and each achene contains one seed.
seeds contained within the anthocarp and not subjected to stratification, scarification, or a chemical treatment served as the control.
In cold-stratified and warm-cold-stratified treatments, removal of seeds from the anthocarp resulted in increased germination.
The fruit is a 4-winged indehiscent anthocarp, elliptical in outline, square in cross section, with cordate base and apex.
Anthocarp polymorphism and anatomy for nine species of Abronia found in California.
Anthocarp dispersibility and its ecological implications for nine species of Abronia.
In Tripterocalyx, the anthocarp enlarges greatly, hardens, and develops three or four large, membranaceous wings.
In this experiment, a similar phenomenon might have been at work; I found three empty, but mature, anthocarps, although in most cases where an achene failed to mature, the anthocarp was aborted also.
All but one of the unmodified flowers in the control group produced a mature anthocarp filled with a normal achene, indicating that with a combination of self-pollination and outcrossing, T.