MANUAL OF THE PLANTS OF WESTERN TEXAS, 
ANYLYTICAL KEY TO THE ORDERS. 
Series I. PHANEROGAMS or FLOWERING PLANTS: those producing 
true flowers and seeds. 
Class I. ANGLOSPERMS: those in which the ovules are contained in a 
closed ovary. 
Subclass I. DicoryLEDONS: those whose embryos have a pair of op- 
posite cotyledons ; the fibro-vascular bundles of the stem form a 
more or less complete hollow cylinder; the leaves are net-veined, 
and the flowers usually 4 or 5-merous, 
Division I. POLYPETAL®: those that have usually both calyx and co- 
rolla, the latter of separate petals. 
A. Stamens numerous, at least more than ten, and more than twice the sepals or lobes of 
the calyx. 
1. Calyx entirely free and separate Srom the pistil or pistils, 
Pistils numerous, separate, but concealed in a hollow receptacle. Rosa,in Rosacr.x, 106 
Pistils several, immersed in hollows of the upper sur- 
face of a large top-shaped receptacle ...-......... Neiumbo, in NYMPHHACEEH, 11 
Pistils more than one, separate, not inclosed in the receptacle, 
Stamens inserted on the calyx, distinct .................---...... Rosace®, 101 
Stamens united with the base of the petals, monadelphous .....MALVACEX, 35 
Stamens inserted on the receptacle. 
Flowers diwcious; twiners with alternate leaves ..... MENISPERMACES, 10 
Flowers perfect ; if climbers, the leaves opposite...... RANUNCULACEEH, 6 
Pistils several-lobed, the ovaries united below the middle.......... RESEDACE%, 23 
Pistils several, their ovaries cohering in a ring around an axis...... MALVACE&, 35 
Pistils strictly one as to the ovary; the styles or stigmas may be several. 
Leaves punctate under a lens with transparent dots ......... HYPERICINE®, 34 
Leaves not punctate with transparent dots. 
Ovary simple, 1-celled, 2-ovuled ..............-.-..--....-... Rosace#, 101 
Ovary compound, 1-celled, with a central placenta ....... PORTULACEX, 31 
Ovary compound, 1-celled, with two or more parietal placentz. 
Calyx caducous; juice milky or colored ............. PAPAVERACE®, 12 
Calyx deciduous, of 4 sepals.......................... CAPPARIDEE, 22 
Calyx persistent, of 3 or 5 sepals.........---.....-..-.-.. CISTINEX, 23 
Calyx valvate in the bud, and 
Persistent; stamens monadelphous ; anthers 1-celled.MALVACE&, 35 
Deciduous ; anthers 2-celled.........--.....-.. ceceee TILIACEH, 45 
Calyx imbricated in the bud, persistent, 
Shrubs; ovary 3-celled............2........--..--.... BIXINE®, 25 
Aquatic or marsh herbs; ovary many-celled..... NYMPHLEACEX, 11 
1 
