188 
XXXIV. DROSERACEiE 
numerous. Capsule enclosed within the persistent calyx and 
corolla, 3-valved; seeds minute, attached to the valves. (Fig. 55.) 
Simla, common on pasture lands and banks ; August, September. — Tem- 
perate Himalaya, 4000-8000 ft. — Hilly regions throughout India. 
Darwin by the publication of his Insectivorous Plants (1875) has added 
greatly to the interest of the Sundews. At Simla it is impossible to find a plant 
without some captured insects or their remains entangled on the leaves. 
XXXV. HALORRHAGIDACE^ 
Weak, flaccid herbs, growing in water or on mud. Leaves 
opposite or whorled, simple or pinnately divided ; stipules none. 
Flowers minute, 1-sexual, regular or incomplete, spicate or 
axillary. Calyx-tube adnate to the ovary ; limb usually 4-toothed. 
Petals 4 or none. Stamens 8 or only one ; anthers 2-celled. 
Ovary inferior, 4-celled ; ovule solitary in each cell. Fruit a 
minute, oblong or orbicular capsule, dividing when ripe into 4 
one-seeded nuts. — Nearly all regions. — Origin of name obscure. 
Leaves whorled, pinnately divided. Flowers in a terminal 
spike . . . . . . . . .1. Myriophyllum. 
Leaves opposite, undivided. Flowers axillary . . 2. Callitriche. 
1. MYRIOPHYLLUM. From the Greek murion, many, and 
phyllon , a leaf. — Nearly all regions ; most numerous in Australia. 
Myriophyllum spicatum, Linn. ; FI. Br. Ind. ii. 433. A 
glabrous, nearly submerged herb, the flower-spikes only appearing 
above the surface ; stems leafy, varying in length according to 
the depth of water, more or less branched. Leaves whorled, 
usually in fours, pinnately divided ; segments simple, distinct, 
hair-like, J-J in. Flowers sessile, in whorls of about 4 forming 
slender, terminal spikes ; each flower surrounded by 1 large and 2 
minute bracts ; upper flowers male, lower female. Male flowers : 
calyx 4-toothed ; petals 4, concave ; stamens 8, filaments short ; 
ovary rudimentary. Female flowers : calyx 4-grooved, teeth 4, 
minute ; petals minute or none ; stigmas 4, nearly sessile. Fruit 
oblong, dividing into 2 or 4 nutlets. 
Simla, the Glen ; June-August. — W. Himalaya, 1000-6000 ft. — Afghanistan. 
- — X. temperate and cold regions. (Britain, Water Milfoil.) 
2. CALLITRICHE. From the Greek halos, beautiful, and 
thrix, trichos, hair ; referring to the stems. — Nearly all regions 
(Britain, Water Starwort). 
