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4, A. levis (Torr.) Muell. Stems, ete., asin the last: leaves obovate- or lanceolate- 
spatulate, acute, narrowed at base to a short petiole, entire: racemes twice shorter 
than the leaves: staminate flowers with linear-lanceolate calyx-lobes, and lanceolate 
petals equaling the calyx; pistillate with lanceolate calyx-lobes and much shorter 
petals: glands hypogynous, compressed-filiform, often lobed: ovary glabrous: styles 
glabrous, with lobes dilated at apex: seed globose, minutely apiculate, more or less 
undulate rugulose (Aphora levis Torr.)—Near Pecos City. 
+ + Fertile flowers with rudimentary petals. 
5. A.pilosissima (Benth,)Muell. Similar to thenext, but the pubescence longer and 
more yellow: leaves subsessile, obovate, or the upper lanceolate-elliptical or oblong- 
ovate, acute, obtuse at base: racemes longer than the leaves: calyx-lobes narrowly 
lanceolate, long acuminate: staminate petals spatulate-ovate, equaling the calyx: 
glands of both kinds of flowers long and hirsute-villous: seeds reticulated, plicate- 
roughened (Serophyton pilosissimum Benth. Aphora pilosissima Torr,)—Southern 
Texas. 
6. A. mercurialina Muell. Stem erect, nearly simple (3 to 6dm. high), sericeous: 
leaves sessile, oblong-ovate to lanceolate, entire, pubescent with appressed hairs or 
glabrate, somewhat rigid: racemes many-flowered, exceeding the leaves: staminate 
flowers with linear-lanceolate membranaceous calyx-lobes, and spatulate petals 
equaling the calyx; pistillate with lanceolate calyx-lobes: glands of both kinds of 
flowers long and glabrous: ovary sericeous: pod appressed-pubescent: seeds smooth. 
—Throughout central and southern Texas. 
9. BERNARDIA P. Browne. 
Shrubs or undershrubs, with simple or stellate pubescence, alternate 
2-stipulate leaves, dicecious flowers in small spicate or racemose clusters 
(mostly axillary, apetalous, and without involucre), staminate calyx 3 to 
5-parted, pistillate usually 5 to 6 (sometimes 3 or 9)-parted, 5 to 20 dis- 
tinct stamens with cruciate globose anthers, 3-celled and 3-ovuled ovary, 
nearly sessile stout 2-lobed or parted (lacerate or papillose) stigmas, and 
non-carunculate seeds. 
1. B. myricefolia (Scheele.) Watson. Irregularly branched shrab (9 to 30 dm, 
high), grayish-green throughout, with a dense fine stellate-pubescence: leaves thick 
and reticulate-veined, oblong to ovate-oblong, obtuse, cuneate to cordate at base (1 
to 5 em. long), repand-dentate, very short-petioled: staminate flowers small and 
axillary, pistillate terminal and sessile: calyx 3 (rarely 4)-parted: stamens 3 to 20: 
seeds 5 mm. long nearly smooth, dull, slightly carinate (Tyria myricefolia Scheele. )— 
Western Texas. 
10. ACALYPHA L. (THREE-SEEDED MERCURY.) 
Herbs, with alternate petioled stipulate leaves, moncecious or dicecious 
apetalous flowers, sterile ones very small and clustered in spikes with 
few or solitary fertile ones at base or in separate spikes, sterile calyx 
4-parted, fertile 3 to 5-parted, 8 to 16 short stamens monadelphous at 
base and with long anther-cells, 3 styles with upper face or stigma cut- 
fringed, and pod separating into 3 globular 2-valved carpels (rarely 1), 
* Both kinds of flowers in the same spike. 
1. A. Virginica L. Smoothish or hairy (3 to 6 dm. high), often turning purple: 
leaves ovate or oblong-ovate, obtusely and sparsely serrate, long-petioled: sterile 
spike rather few-flowered, mostly shorter than the large leaf-like palmately 5 to 9- 
cleft fru#ting bracts: fertile flowers 1 to 3 in each axil: pod smooth or merely pubes- 
