340 
CLASS XIX. ORDER XII. 
Southern. 
Zea. Staminate flowers — calyx-glume 2-flowered, awnless : corolla-glume 
awnless. Pistillate flowers — calyx glume 2-valved, (number of valves increas- 
ed by cultivation :) stylp l, very long, filiform, pendulous : seed solitary, im- 
mersed in an oblong receptacle. 4. 10 — (Indian corn.) 
Order 4. Tctrandria. 
Alnus. Staminate flowers — ament composed of wedge-form, truncate, 3- 
flowered receptacles : calyx a scale, 3-lobed ; corolla 4-parted. Pistillate flow- 
ers — calyx 2-flowered scales, somewhat 3-cleft : corolla 0 : seed compressed 
ovate, wingless. 50. 99 — (alder.) & 
Ur 'tica. Staminate flowers — calyx 4-leaved ; corolla 0: nectary central, 
cyathiform. Pistillate flowers — calyx 2-leaved, (2-valved :) corolla 0 : seed 1, 
glossy. 53. 98 — (nettle.) S. 
Morus. Staminate flowers — calyx 4-parted : corolla 0 : Pistillate flowers 
— calyx 4-leaved : corolla 0 : styles 2, calyx becoming berry-like : seed 1. 
53. 98 — (mulberry.) S. 
Order 5. Pentandria. 
Amarak' thus. Staminate flowers — calyx 3 or 5-leaved : corolla 0 : stamens 
3 or 5. Pistillate flowers — calyx and corolla as the staminate : styles 3 : cap- 
sule 1-celled, opening transversely : seed 1. 54. 30 — (amaranth, red cocks- 
comb.) S. 
Ambro'sia. Staminate flowers — common calyx 1-leaved : anthers in con- 
tact but not united : corolla 1-petalled, 5-cleft, funnel-form : receptacle naked. 
Pistillate flowers — calyx 1-leaved, entire, the swelling part 5-toothed, 1-flow- 
ered; corolla 0 ; nut. from the indurated calyx 1-seeded. 54. 98 — (hog-weed.) 
S. 
Order 12. Polyandria. 
A. Stems not woody. 
Sagitta'ria. Staminate flowers — calyx 3-leaved : corolla 3-petalled ; fila- 
ments mostly 24. Pistillate flowers — calyx and corolla as in the staminate : 
germs many ; capsules aggregate, 1-secded, not opening. 5. 13 — (arrow- 
head.) S. 
Arum. Spatha cucullate, 1-leaved ; spadix not entirely covered with the 
fructification ; being more or less naked above, with pistillate flowers beneath, 
and staminate in the middle; (sometimes a few are staminate beneath ; berry 
mostly 1-seeded, generally cirrose-glandular beneath.) 2. 7 — (indian turnip, 
wake-robin.) S. 
Calla. Spatha ovate, becoming expanded : spadix covered with the fruc- 
tification: stamens intermixed. Staminate flowers — calyx and corolla 0 : an- 
thers sessile. Pistillate flowers — calyx and corolla 0 : berries 1-celled, many 
seeded, crowned with the short style. 2. 7 — (water arum.) 
Euphor"bia. Involucrum perianth-like, inflated, with alternating petal-like 
segments. Staminate florets 12 or more, at the base of the stipe of the pistil- 
late flower, each consisting of an anther united to a pedicel by a filament. 
Pistillate flower central, single, stiped ; with 3 two-cleft styles : capsule 3-lob- 
ed. 38. 96 — (caper, spurge.) S. 
Exotic. 
Pote'rium. Staminate flowers — calyx 4-leaved : corolla 4-parted : sta- 
mens 30 to 50. Pistillate flowers — calyx and corolla like the staminate : pis- 
tils 2 : berry from the indurated tube of the corolla. 54. 92 — (burnet.) 
B. Stems woody. 
Quercus. Staminate flowers — ament loose : calyx sub-5-clefl : corolla 
none : stamens 5 to 10. Pistillate flowers — calyx 1-leafed, entire, scabrous, 
being a woody cup : style one, stigma 2 to 5 : nut or acorn 1-celled, 1 seeded, 
coriaceous, surrounded at the base by the permanent calyx. 50. 99 — (oak.) S. 
Cor'vlus. Staminate flowers — ament cylindric, imbricate : calyx a 
