430 LV. HAMAMELIDEJ;. (C. B. Clarke.) [Altingia. 



ASSAM and BHOTAN ; Griffith. PEGU and MERGUI, Kurz. DISTRIB. Java, Yunan. 



A tree 60-100 ft. high. Leaves 3-4 in., glabrous on both surfaces, or with tufts 

 of hairs in the axils of the nerves beneath. The only other species, A. chinensis, 

 differs in its thicker leaves, less acuminate, and much more shortly petioled. 



ORDER LVI. HAX.ORAGEJE. (By 0. B. Clarke, F.L.S.) 



Herbs, either weak aquatics or small land plants. Leaves opposite or 

 whorled (or in the Indian species occasionally partly alternate) when submersed 

 often pectinately pinnatifid ; stipules 0. Flowers axillary, solitary or clustered, 

 sessile less often pedicelled, the whorls often simulating a spike ; hermaphrodite 

 or unisexual, always small. Calyx-lobes 4 or 0. Petals 4 epigynous or 0. 

 Stamens 8, 4, or 1 epigynous in the hermaph. flowers. Ovary inferior, 4-, 2- or 

 1-celled ; styles 4, 2 or 1, fimbriate or simple ; ovules 4, pendulous (or in 

 Hippuris 1). Fruit small dry or drupaceous, 4-2-1-celled, indehiscent or 

 separating into its carpels; seeds 4 or more rarely 1. DISTRIB. Species 80, 

 many aquatic ; spread over the whole globe. 



Terrestrial. Flowers all sessile or subsessile. Stamens 8 . . 1. HALORAGIS. 



Terrestrial. Male flowers pedicelled. Stamens 8 .... 2. SERPICULA. 



Aquatic. Stamen 1. Style 1. Ovule 1 3. HIPPURIS. 



Aquatic. Stamens 8 or 4. Styles 4. Seeds 4 4. MYRIOPHYLLUM. 



Aquatic or subaquatic. Stamen 1. Styles 2. Seeds 4 . . 5. CALLITRICHE. 



1. HAX.ORAGIS, Forst. 



Branching wiry herbs. Leaves opposite, the upper sometimes alternate, toothed, 

 rigid. Flowers minute, nearly sessile in the axil of bracts, spicate or racemose, 

 partially unisexual or hermaphrodite. Calyx-tube 4-8-ribbed ; lobes 4 erect 

 persistent acute valvate. Petals 4 coriaceous, often wanting in the $ . Sta- 

 mens 8 epigynous. Ovary 2- or 4-celled with 4 pendulous ovules ; stigmas 4 

 (in the females at least) sessile, feathery. Fruit a dry 2-4-celled 2-4-seeded 

 nut ; but in the two Indian species by abortion 1-celled 1-seeded. DISTRIB. 

 Species 40 ; reaching from Japan and East Bengal to New Zealand ; Australia 

 being the centre of the genus ; one species found in Juan Fernandez. 



1. K. micrantha, Br. in Flinders Toy. ii. 550 ; glabrous, leaves ovate 

 acute denticulate, flowers in terminal often subpaniculate racemes. Benth. Fl. 

 Austral, ii. 482. H. tenella, Brongn. in Duperr. Voy. t. 68. Gonocarpus rni- 

 cranthus, Thunb. Fl. Jap. t. 15 ; DC. Prodr. iii. 66. Goniocarpus micranthus, 

 Koen. fy Sims Ann. Bot. i. 546, t. 12. 



i 



KHASIA MTS., alt. 5000-7000 ft., Griffith, J. D. H. $ T. Thomson. SIKKIM, alt. 

 8000-10,000 ft., J. D. H. DISTBIB. From Sikkim and Japan across China Malaya 

 and Australia to New Zealand. 



A wiry branching herb, stems 4-16 in. Leaves J in., opposite, very shortly 

 petioled ; upper sometimes alternate passing by degrees into the lower bracts. Flowers 

 very_ small ; pedicels about ~ in. Petals thrice the triangular sepals. Fruit about 

 ^ in. long, shining, glabrous with 8 ribs, 1-celled, 1-seeded. 



2. K. tetrag-yna, Hook.f. Fl. Neiv Zealand, i. 62 ; harshly though often 

 minutely scabrous, leaves lanceolate (ovate in the New Zealand form) serrate, 

 flowers in terminal often subpaniculate spikes. H. scabra, Benth. Fl. Hongk. 



