Spur, 169.
Spuria, 120.

Spurs, 283.
Squama, 148.
Squamellus, 148.
Squamulæ, 149.

Squamosa, 261.

Squamosus, 63. 470. 493.
Squarrose, 493.

slashed, 461.
Squarroso-laciniatus, 461.
Stalklets, 138, 139.

Stamens, 151. *171, 172. 515.
-, sterile, 181.

Staminidia, 266. 269.

Standard, 168.

Starch, 380. 557, 558, 559.
Starry, 60.

Starved, 493.

Stellate, 60. 466. 491.
Stelliformis, 491.

Stellulatus, 491.

Stem, 69.84. 309. 515.

aerial, 80. 82.
creeping, 82.
determinate, 73.

external modifications of the, 80.

indeterminate, 73.

internal modifications of the, 85.

parts of the, 70.
subterranean, 80.
virgate, 72.
Stem-clasping, 489.
Stemless, 85.
Stephanoum, 240.
Sterigmata, 120.
Sterigmum, 237.
Stigma, 193. 196. 516.
Stimulans, 60.

Stimuli, 60.

Stinging, 470.
Stings, 60.

Stipels, 144.

Stipes, 70. 260. 274.
Stipitate, 490.

Stipulæ, 268. 515.

Stipules, 143.

Stole, 83, 84.
Stoma, 57.

*

Stomates, 51. 123. 279. 558.
numerical proportions of,

on various surfaces, 56.
Stomatia, 51.

Stone, 236.
Stool, 84.

Straggling, 488.
Stragulum, 149.

Straight, 485.

Straight-ribbed, 482.
Straight-veined, 132, 133.