156 XXVIII. HALOEAGEAE. [Callitriche. 



1. C. verna, L., Fl. Suec. ed. 2, ii. n. 3. Stems long, slender. Leaves 



linear or otlong-spathulate or linear-obovate, minutely retuse. Fruits convex, 



slightly keeled at the back. — Hook, f., Fl. N.Z. i. 64 ; Handbk. 68. 



NORTH and SOUTH Islands: floating in still water. Mongonui to Southland. Oot. to 

 Feb. 



2. C. antarctica, Engelm. ex Hegelm. in Verh. Bot. Ver. Brandent. ix. 



(1867) 20. Stems 2in.— Sin. long, succulent, densely matted, rooting at the 



nodes. Leaves fleshy, linear-obovate-spathulate, rounded at the apex. Fruits 



obcordate, convex on the sides, scarcely keeled at the back. — C. verna fS terres- 



tris, Hook, f., Fl. Antarc. i. 11. 



The SNARES, AUCKLAND and CAMPBELL Islands, ANTIPODES Island, MAGQUARIE 

 Island. Also in Kergueleu's Land, &c., Falkland Islands, and South Georgia. On damp soil. 

 Dec, Jan. 



3. C. Muelleri, Sond. in Linn, xxviii. (1856) 229. Stems filiform or 

 capillary,, densely matted. Leaves mostly rhomboid or rhomboid-spathulate, 

 usually with a minute tooth on each side, sharply narrowed into a distinct 

 petiole. Female flowers usually with an abortive stamen at the base. Fruits 

 orbicular-ohcordate, with a deep notch and 4 membranous wings. — C verna, p, 

 Hook, f., Fl. N.Z. i. 64. C. microphylla, Col. in Trans. N.Z.I, xx. (1887) 190. 

 C. tenella, Banks and Sol. MSS. 



Var. obtusangula. Leaves obovate, narrowed into a petiole. Fruits larger and more orbi- 

 cular, with a very narrow wing. — Sp., Le Gall, ex Hegelm. Monog. Call. 54. 



NORTH and SOUTH Islands : North Cape to STEWART Island ; CHATHAM Islands. On 

 damp ground. Var. obtusangula most frequent in the South. 



It is worthy of remark that Gallitriche is not mentioned by A. Richard, Cunningham, or 

 Eaoul. 



Okdee XXIX.-MYRTAOBAE. 



Calyx-tube adnate with the ovary at least to the insertion of the petals, 



sometimes produced beyond it ; limb 4— 5-cleft ; lobes usually imbricate in bud. 



Petals 4—5, imbricate ia bud, equal or nearly equal when expanded, sometimes 



coherent, forming an operculum, rarely 0. Stamens oo, usually numerous, 



rarely few, inserted on a disk lining the calyx-tube and forming a thickened 



margin at its mouth ; filaments incurved in bud ; anthers small, didymous. 



Ovary inferior, often wholly enclosed in the calyx-tube, 4— 5-celled ; style 



simple ; stigma capitate, rarely lobed ; ovules numerous or rarely few, on 



parietal placentas. Fruit inferior, 1 or more celled, often crowned by the 



persistent calyx-limb, capsular and dehiscing loculicidally at the apex, or inde- 



hiscent, 1-seeded, dry or fleshy. Perfect seeds few. Endosperm usually 0. 



Embryo straight or curved. Shrubs or trees, sometimes scandent, with opposite 



or alternate exstipulate entire leaves, which are dotted with pellucid oil-glands. 



Flowers hermaphrodite, solitary or in terminal racemes, cymes, or panicles, often 



of great beauty. 



Gbneba, 80. Species, about 1,850. Plentiful in the tropics ; rare in the north temperate 

 zone, but more frequent in the south, extending to Cape Horn and Campbell Island. 



