434 LVI. HALORAGE.E. (C. B. Clarke.) \_Myriophyllum. 



Leaves in the Indian examples sometimes whorled, more commonly in tufts of 1-3, 

 each tuft placed irregularly round the stem. The Australian M, varicefolium has the 

 leaves usually whorled ; but the whorls get broken and the Australian examples be- 

 come thus exactly like the Indian ; the fruit is altogether the same. The correct 

 name of this plant is, open to much question. De Candolle's is the oldest, but the 

 accompanying description was drawn up to fit Hottonia sessiliflora, Vahl Symb. ii. 

 36 which probably was something altogether xlifferent ; then a Myriophyllum is dis- 

 covered in India which De Candolle's description very fairly fits, and Hohenacker 

 and others apply it to the Candollean name. 



5. CALLITRICHE, Linn. 



Glabrous slender annual h,erbs growing in inoist places, or their branches 

 floating or submerged. Leaves opposite, linear- or obovate-spathulate, entire, the 

 upper ones often rosulate. Floivers minute, axillary, unisexual, usually monoecious, 

 solitary, or sometimes one male and one female in the same axil simulating a 

 hermaphrodite flower ; achlarnydeotis ; bracteoles white, membranous, linear- 

 oblong, very caducous. MALE : stamen 1. FEMALE : ovary 4-ridged 4-celled ; 

 styles 2, elongate, stigmatose their whole length ; ovules solitary in each cell, 

 pendulous. Fruit coriaceous, indehiscent, 4-seeded, the 4 carpels at length 

 separating. DISTRIB. Species 1 or 2 found almost all over the globe ; but some 

 authors allow 10 or 20 species. 



[The distribution of such critical species as these Callitriches cannot be safely 

 stated; there are examples collected in Sikkim, alt. 8000-9000 ft., by Sir J. D. 

 Hooker which are probably C. verna (and not C. stagnates), but they show no fruit.] 



1. C. stag"nalis, Scop. FL Carniol. ii. 251 ; leaves obovate-spathulate, 

 styles subpersistent, fruit suborbicular the edges acute keeled but hardly winged. 

 Koch Syn. FL Germ. 212 ; Hegelm. Monogr. Callitrich. 58. 0. Wightiana, 

 Wall. Cat. 7008 ; W. $ A. Prodr. 339 ; Wight Ic. 1947 ; Miq. FL 2nd. Sat. 

 i, pt. i. 635. 



Indian mountains from the HIMALAYA, alt. 5000-10,000 ft., to the DECCAN, alt. 

 7000 ft. Ceylon, alt. 5000 ft., Thwaites. DISTRIB. Europe. North Asia, Tropical 

 Africa, Malaya, Australia and New Zealand. 



2. C. verna, Linn. ; Koch Syn. FL Germ. 212 ; leaves oblong-spathulate, 

 fruit longer than broad the edges not keeled. Hegelm. Monogr. Callitrich. 55. 



TEMPERATE WESTERN HIMALAYA, alt. 5000-8000 ft., Edgeworth; KASHMIR, 

 alt. 7000 ft., C. B. Clarke. DISTRIB. Europe. Cold and temperate Asia and North 

 America. 



OKDEK LVII. RHXZOFHOREJE. (By the Rev. G. Henslow, F.L.S.) 



Trees or shrubs. Leaves opposite, stipulate (except Anisophylled) , usually 

 coriaceous, glabrous ; stipules interpetiolar, very caducous. Flowers axillary, 

 usually bisexual, surrounded at the base with connate or cupuliform bracts or 

 ebracteate. Calyx more or less adnate to the ovary (except Blepharistemma) ; 

 limb produced beyond the ovary, 4-14-lobed ; lobes valvate, persistent. Petals 

 equal in number to the sepals, entire emarginate 2-fid or lacerate. Stamens 

 usually twice the number of petals, in pairs opposite to and embraced by them, 

 rarely indefinite (Kandelia) ; anthers 2-celled, rarely nmlti-locellate (Rhizophord) . 

 Ovary from 5- to 1-celled by solution of the septa ; styles connate (except in 



