694 EUPHORBIACEAE 
usually present, but often small or rudimentary, alternating with glands: stamens 5 or 
more, inflexed in the bud.  Pistillate flowers clustered or loosely racemose below the stam- 
inate : sepals 5-10 : petals usually wanting: ovary mostly 3-celled : ovule one in each cav- 
ity : styles or stigmas once, twice or many times 2-cleft. Capsule splitting into 2-4 (usually 
3) 2-valved carpels. Seeds one in each carpel, smooth or minutely pitted. The plants 
flower from spring to fall or throughout the year in many cases. 
Staminate and pistillate flowers with petals. 1. C. Alabamensis. 
Staminate flowers with petals, or both staminate and pistillate without petals. 
Petals present in the staminate flowers, wanting or rudimentary in the pis- 
tillate. 
Plants with scaly foliage. 
Plants with stellate-pubescent foliage. 
Pistillate calyx mostly not acerescent: leaf-blades entire. 
Leaf-blades ovate to oblong or broadly lanceolate. 
Leaves with ovate to narrowly ovate blades. 
Stamens 10. 3. C. fruticulosus. 
Stamens more than 10. 
Styles 3, twice 2-parted or 4-parted. 4 
Styles 3, 2-parted. b 
Leaves with oblong or broadly lanceolate blades. 
Staminate raceme less than 5 cm. long. 6. C. Torreyanus. 
Staminate raceme more than 5 cm. long. 7. C. Cortesianus. 
8 
9 
to 
c^ 
^ argyranthemus, 
. C. Berlandieri. 
. C. suaveolens. 
Leaf-blades linear or narrowly oblong. 
Blades narrowly linear, glabrate above. 
Blades narrowly oblong, minutely stellate above. 
Pistillate calyx mostly accrescent: leaf-blades toothed or entire. 
Leaves with toothed blades. 
. C. linearis, 
. €. Fergusonit. 
Shrubs. 10. C. betulinus. 
Herbaceous annuals. : 
Sepals of pistillate flowers glabrous or nearly so. 11. C. Floridanus. 
Sepals of pistillate flowers pubescent. 12. C. glandulosus. 
Leaves with entire blades. 
Plants annual. 
Pistillate flowers not pendulous from the base of the'racemes. 
Sepals 6-8, equal or nearly so: styles twice or more 2-cleft. 
Lower leaves with lanceolate, oval or ovate blades: 
sepals not hooded. ; 
Petioles long, tomentum of inflorescence purplish. 13. C. capitatus. — 
Petioles short, tomentum of inflorescence yellowish. 14. C. Engelmannü. 
Lower leaves with linear or linear-lanceolate blades: 
sepals hooded. 15. C. Elliottü. 
. Sepals 5, very unequal: styles 2-cleft. 16. C. leucophyllus. 
Pistillate flowers early drooping!from the base of the racemes. : EUM 
Ovary 3-celled : capsules 3-seeded. 17. C. Lindheimertanus. 
Ovary 2-celled : capsule I-seeded. 18. C. monanthogynus. 
Plants shrubby. 19. C. corymbulosus. 
Petals wanting in both the staminate and pistillate flowers. 
Plants perennial or shrubby. 
Staminate raceme short, 3 cm. or less. 20€. punctatus. 
Staminate raceme long, 3 cm. or more. 21. C. Neo-Mexicanus. 
Plants annual. 22. C. Texensis. 
1. Croton Alabaménsis E. A. Smith. A much branched evergreen shrub 2-3 m. 
tall, with a grayish white bark, the stem sometimes becoming 6 cm. thick. Leaf-blades 
oblong to oblong-lanceolate, 5-8 cm. long, firm-membranous, green and glabrate above, 
clothed beneath with silvery overlapping scales, usually without glands at the slightly 
oblique base, short-petioled : racemes 3-5 cm. long: flowers sometimes numerous: stami- 
nate 10-20 ; sepals and petals ciliate ; stamens 10-25: pistillate flowers 4-7, their pedicels 
becoming 4-8 mm. long ; sepals 3-4 mm. long ; petals scaly without ; glands 5 : capsules 
3-lobed, 6-8 mm. long, depressed at the apex, scaly : seeds oval, biconvex, 5-7 mm. long. 
On limestone hills. middle Alabama. 
. 2. Croton argyránthemus Michx. A perennial shrubby plant 3-6 dm. tall, "a 
silvery or somewhat rusty foliage and approximate branches. Leaf-blades various, t » 
lower ones obovate to oval, the upper oblong to oblong-lanceolate, 1-5 cm. long, blunt, 
scaly or glabrate above, clothed with silvery scales beneath, narrowed to petioles <u a 
1-3 as long as the blades: racemes 2-5 cm. long: staminate flowers often 10-15 ; ape 
lanceolate, acute; petals oblong, scaly without; stamens mostly 10; filaments swollen a: 
the base: pistillate flowers few, often nearly sessile ; sepals 5-7, partially united, aai j 
petals wanting; glandular disk entire or 5-lobed : capsules 3-lobed, globular or és 
globose, about 5 mm. long, depressed at the apex : seeds biconvex, less than 5 mm. !on&- 
In dry soil and pine lands, Georgia and Florida to Texas and New Mexico. 3 
3. Croton fruticulòsus Engelm. A slender branched shrub 1-2 m. tall, with gray 
or yellowish tomentum, the branches densely stellate-tomentose. Leaf-blades Ata ee 
narrowly ovate, 3-8 cm. long, acute or acuminate, entire or remotely glandular-denticulate, 
