Gallery

A, seed; B, longitudinal section of seed showing embryo; C, transection of seed drawing by Lynda E. Chandler

hilum of seed

surface reticulation of seed

flowers and immature fruits; photo: © Forest and Kim Starr, USGS

fruits; photo: © 2004 by Philip A. Thomas

seeds

marginal view of seeds

hilum of seed

surface detail of seed

embryo seen in longitudinal section of seed

achenes

achene with pappus

apex of achene

scar of achene

detail of ridged surface of achene

longitudinal section of achene showing embryo (left) and naked embryo (right)

portion of inflorescence (left); terminal spikelet with two pedicellate spikelets (middle); spikelet with pedicellate spikelet and rachis segment (right)

ventral view of spikelets with pedicel and rachis segment

dorsal view of spikelets

spikelets with apices broken off

caryopses in dorsal view (left) and ventral view (right)

caryopses in side view

fruits

fruits

fruits

fruits with spongy layer mostly removed, exposing stony, ridged endocarp

A, fruit; B, fruit with spongy exterior removed; C, longitudinal section of fruit showing embryo; D, transection of fruit; drawing by Lynda E. Chandler

dorsal view of seeds

ventral view of seeds

side view of seed

surface detail of seed

A, fruit; B, seed; C, longitudinal section of seed showing embryo; D, transection of seed; drawing by Lynda E. Chandler