Thurniaceae

seed

Fruit dehiscentdehiscent:
(v. dehisce) splitting open at maturity to release contents (of a fruit)
, loculicidalloculicidal:
type of capsular dehiscence, opening longitudinally through the locules (compare septicidal)
capsulecapsule:
a dry, dehiscent fruit formed by two or more carpels
, 1–15 mm long, triangulartriangular:
2D shape—three relatively straight sides with distinct corners; more angular than teardrop-shaped
, angledangled:
2D shape—having sides that meet at acute or obtuse angles  
in transectiontransection:
a cross section; representing a plane made by cutting across an organ at a right angle to its length
, usually 3 seeded, hypanthium sometimes present. Pericarppericarp:
fruit wall or fruit coat
smooth.

Seed fusiformfusiform:
spindle-shaped; broadest at the middle and tapering at both ends
(ovate to broadly ovateovate:
2D shape—egg-shaped in outline, widest point is towards one end of the organ, the other end tapers gradually, attachment at or near the broad end (compare obovate, ovoid)
in Prionium), tereteterete:
approximately circular in cross section; width and thickness approximately equal
(triagonal in Prionium) in transectiontransection:
a cross section; representing a plane made by cutting across an organ at a right angle to its length
, 5–8 mm long, with hair-like appendages at both ends (not appendiculate in Prionium). Seed coat with short, straight hairs (glabrous in Prionium).  

Embryo well developed, linearlinear:
(shape) long, narrow, and uniform in width; (of embryo) embryo is straight and much longer than wide
to broad, straight, 0.3 times the length of the endosperm (or nearly as long in Prionium). Endospermendosperm:
nutritive starch- and oil-containing tissue present in many seeds
copious, mealymealy:
loose, dry, and disintegrating in finely granular pieces like meal or flour
.