[Akoya 198 (149i) 9 29, 
litriche. | CALLITRICHACEAR. O45 
CALLITRICHE Linn. 
Characters of the family as defined above. 
_A genus of very doubtful affinity, now often placed in the vicinity of the Huphor- 
eae. The species are estimated at from 1 or 2 to 20 or 30, according to the different 
‘ws of authors, 
uits not winged, edges almost obtuse, groove between the carpels 
shallow et iM 1. C. antarctica. 
wuts slightly winged, edges sharply keeled, stoove between the 
carpels tather shallow , ‘ . 2. C. verna, 
uits broadly winged, wings pale, groove between the carpels deep 3. CU. Muelleri. 
i. C. antaretica Hngelm. ex Hegelm. in Verh, Bot. Ver. Brandenb. 1x 
367) 20.—Stems creeping and rooting, rather stout, succulent, densely 
‘ted, 2-6in. long. Leaves fleshy, }-d in. long, narrow obovate-spathu- 
—~ or oblong- spathulate, rounded at the tip, narrowed into a rather long 
ole. Fruit sessile, broadly oblong or almost orbicular, somewhat turgid, 
, winged, the edges subacute or almost obtuse, separated by a shallow 
»ove, so that each pair of lobes is united by almost three-quarters of their 
es.—Kidder in Bull. U.S. Nat. Mus. 1, 23; T. Kirk Students’ Fl. (1899) 
; Cheesem. Man. N.Z. Fl. (1906) 158. C. verna var. b terrestris Hook. f. 
Antarct. 1 (1844) 11. ©. verna subsp. obtusangula Hook. f. Phil. Trans. 
noy. Soc. 1868 (1879) 20. 
THe SNARES, AUCKLAND AND CAMPBELL ISLANDS, ANTIPODES ISLAND, MACQUARIE 
IsLAND: Not uncommon on damp soil, Also found on Kerguelen Island, Falkland 
Islands, and South Georgia. 
2. €. verna Linn. #1. Suec. u (1755) n. 3.— Usually floating in still 
water.. Stems siender, sparingly branched, 3-121in. long. Leaves 4$—# in. 
long, linear-spathulate or oblong- spathulate or oboy ate, rounded or retuse 
at the tip, very thin and membranous. Fruit sessile, rather longer than 
broad, subcordate, somewhat convex, edges shortly and acutely keeled, 
groove between the lobes rather shallow.—Hook. f. FI. Nov. Zel. 1 (1853) 
64; Handb. N.Z, Fl. (1864) 68 (an part); T. Kirk ‘Students’ Fl. (1899) 156 ; 
Cheesem. Man. N.Z. Fl. (1906) 158. 
North AND SoutH Istanps: Not uncommon in streams and lakes throughout. 
An abundant plant in many temperate countries. 
3. C. Muelleri Sond. a Linnaea avin (1886) 229.— Stems filiform, 
2-9 in. long, much branched and interlaced, forming broad matted patches 
on damp soil. Leaves obovate-rhomboid or broadly obovate-spathulate, 
cuneate at the base, suddenly narrowed into a distinct petiole. Fruit 
orbicular-obcordate, often broader than long, flattened, margins expanded 
into a broad pale wing, groove between the lobes deep.—T. Kirk Students’ 
Fil. (1899) 156; Cheesem. Man. N.Z. Fl. (1906) 158. C. verna var. b Hook. 
f. Fl. Nov. Zel. i (1853) 64. C. macropteryx Hegelm. Monog. Callit..(1864) 59, 
t. iv, f. 2. C, microphylla Col. in Trans. N.Z. Inst. xx (1888) 190. 
Kermapdeo Istanps, NortH AnD Soutu Isuanps, Stewart Istanp, CHaTHAM 
Istanps: Common from the North Cape southwards. Sea-level to 2500 ft. Also 
in Australia. 
There seem to be two forms of this—one with a broad wing occupying a third of 
the whole width of the fruit, the other with a much narrower wing. The last-mentioned 
form was referred by Mr. Kirk to C. obtusangula Hegeli, Monog. Callit. (1864) 54, t. 3, 
f. 3; but this determination is clearly erroneous, the true obtusangula having rounded 
angles to the fruit, which is not at all winged. 
18—Fi. 
