102 FLORA OF SOUTH AUSTRALIA. 
11. Leaves all capillary-pinnatisected. 
Leaves whorled; emerged leaves aie eli ; fruitlets 
rough x aa 
Leaves opposite ; fpithela, pee ; se eee en- 
closed before expansion in a petaloid hood-shaped 
bract ss *f ot ; 
1. Emerged leaves entire; submerged leaves 
divided into long capillary segments. 
Emerged leaves narrow-linear ; calyx-lobes conspicuous 
Emerged leaves oval or broadly lanceolate ; calyx-lobes 
minute : ' i. wa “ ‘ 
Callitriche. 
Mostly submerged; upper leaves obovate to spathulate, 
lower ones linear Ps es a if 
ORDER UMBELLIFERAE. 
Fruit ovate of a single carpel, 1-seeded ; styles 2... 
Fruit of two cohering fruitlets, ulimately separating, 
each provided with a style and 1-seeded. 
Fruitlets more or less laterally compressed, without 
oil-ducts. 
Umbels simple ; fruitlets often only moderately 
compressed ; involucral bracts few or absent ; 
stipules scarious ... 
Umbels simple; fruitlets flat or eck com- 
pressed; involucral bracts sigs connate 
below ; exstipulate 
Umbels compound, stipules aie 
Calyx-teeth inconspicuous; fruit ie aed 
compressed 
Calyx-lobes peltate ; fruit nick compr ered 
Flowers in dense spikes or heads, surrounded by 
rigid sharp-pointed bracts; flowers blue; 
fruitlets scarcely compressed; leaves radical 
elongate, prickly .. i ast 
Fruitlets slightly or not ee ie me mee pr eet. 
Fruitlets with 5 prominent ribs, almost or quite 
smooth. 
Umbels simple; leaves linear-terete... 
Umbels simple; leaves much divided 
Umbels compound; calyx-teeth inconspicu- 
ous; one oil-duct under each furrow 
Calyx-teeth prominent; several oil- 
ducts under each furrow 
verrucosum 
Muelleri 
intermedium 
elatinoides 
verna 
Actinotus 
Hydrocotyle 
Didiseus 
Trachymene: 
Xanthosia 
Eryngium 
Crantzia 
Caldasia 
Apium 
Sium 
