ALISMA. 835 
Suborder II. BUTOMEZ. 
Three inner segments of the perianth petaloid. Seeds nume- 
rous, minute. Placenta ramified over the inner surface of each 
follicle. Embryo straight or curved, radicle next the hilum. 
4. Buromus. Perianth 6-parted, coloured, resembling a co- 
rolla, Stam. 9, 3 interior. Follicles 6, connected below, 
bursting inwards. 
Suborder III. JUNCAGINEZ. 
Perianth uniform, herbaceous, inconspicuous, or 0. Seeds 
1—2, erect, approximated at the base. Embryo straight, radicle 
at the opposite end from the hilum, plumule coming through 
a lateral cleft in the embryo. 
5. ScurucHzerRia. Perianth of 6 reflexed leaves. Stam. 6, 
with slender filaments. Ovaries 3. Stigma sessile, downy. 
Fruit compressed, inflated, diverging, 1—2-seeded. 
6. TricLocuin. Perianth of 6 erect deciduous leaves. Stam. 
6, anth. almost sessile. Ovaries 3—6. Stigmas sessile, 
feathery. Carp. attached to an angular axis from which 
they at length separate at the base. 
Suborder I. Alismoidee. 
1. Auisma Linn. 
1. A. Plantago (L.); fi.-stalk panicled with whorled com- 
pound branches, carp. rounded at the end with | or 2 strie on 
the back, fr. depressed obtusely trigonous, 1. cordate-ovate or 
lanceolate.—E. B. 837. R. vi. 57.—L. all radical, on long 
stalks. Submersed 1. linear. Flower-stalk 2—3 feet high. FI. 
pale rose-colour.—f. A. lanceolatum (With.); 1. lanceolate nar- 
rowed below.—By water. P. VII. VIII. Great Water-plantain. 
2. A. ranunculoides (L.); fi.-stalks umbellate, carp. acute with 
5 angles collected into a globose squarrose head, 1. linear-lanceo- 
late acute.—E. B. 326. R. vii. t. 55.—L. all radical, on long 
stalks. Flower-stalks from a few in. to 2 feet high, terminating 
in a simple umbel or 2 umbellate whorls of simple peduncles. 
FL. pale purple.—. A. repens (Dav.); plant depressed, umbels 
rooting and proliferous, fl. larger. E. B. 8. 2722.—Turfy bogs. 
8. Margins of lakes in Wales and Scotland. P. VI. VII. Lesser 
Water-plantain. 
3. A. natans (L.); st. floating and rooting leafy, peduncles simple 
from the joinings of the stem, carp. striate beaked, floating 1. 
stalked oblong obtuse, radical 1. (leafless petioles) linear-tapermg 
