MANUAL OF THE PLANTS OF WESTERN TEXAS, 
ANALYTICAL KEY TO THE ORDERS. 
Division III. APETALa:: those with corolla (and sometimes calyx) 
wanting. 
A. Flowers not in catkins. 
1. Ovary or its cells containing many ovules. 
Calyx present; ovary and pod inferior, 6-celled .....--++-+-+-- ARISTOLOCHIE®, 381 
Calyx wanting; ovary and pod wholly naked, 2-celled ....--.- PODOSTEMACEA, 381 
2. Ovary or its cells containing only 7 or 2 (rarely 3 or 4) ovules. 
* Pistils more than one, distinct or nearly so. 
Flowers naked, perfect .....--2.. 06. ee eee eee eee ee eee cee ...--- PIPERACE®, 382 
Flowers naked, dimcious ...........-------- 22+ cee e eee eee ee eee rees BATIDE&, 372 
** Pistil one, either simple or compound, 
Ovary wholly inferior, 1-celled, 
Parasitic on the branches of trees; anthers sessile....---..--- LORANTHACE®, 384 
Not parasitic above ground; anthers on filaments.--.-----.---- SANTALACE®, 385 
Ovary really free from the calyx, but permanently invested by its tube (or the base 
of it) so as to seem inferior; herbs with corolla-like calyx...... NYCTAGINE, 350 
Ovary plainly free from the calyx, which is sometimes wanting. 
Stipules sheathing the stem at the nodes. 
Tree; calyx none; flowers monccious in heads ......---.----PLATANACEE, 409 
Herbs; calyx present and commonly petal-like ...--.------ POLYGONACE, 372 
Stipules not sheathing the stem, or none. 
Aquatic herbs, submerged or nearly 80 ....-----+--+++++> CERATOPHYLLEZ, 420 
Not aquatics, herbs. ; 
Ovary 10-celled; berry 10-seeded ......-.-----+-++++---- PHYTOLACCACE®, 371 
Ovary 3 (rarely 1 or 2)-celled; juice usually milky. .....EUPHORBIACE#, 385 
Ovary 1-celled; juice not milky. 
Style (if any) and stigma only one; leaves simple; no scarious bracts around 
the flowers .....-....----- 224-22 --- eee eee eee eee eee URTICACEX, 405 
Styles 3; flowers involucrate .......---- Eriogonum, in POLYGONACEE, 372 
Styles or stigmas 2 or 3. 
Stipules scarious; leaves opposite .....-..-..--+-+---- ILLECEBRACEZX, 356 
Stipules none; flowers with scarious bracts ......--AMARANTHACE, 357 
Stipules and scarious bracts none......-----.------ CHENOPODIACEX, 364 
Shrubs or trees. 
Ovary 1 or 2-celled; styles ‘or stigmas 2-cleft..-....--...--... URTICACE, 405 
Ovary 1-celled; style and stigma single and entire. 
Anthers opening longitudinally. .........-.--.---.---.THYMELEACE®, 383 
Anthers opening by uplifted valves... ..--.. ..00--e2--+e- LAURINEE, 382 
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