228 THE FLORA OF THE NORTHERN TERRITORY. 



Locality. — Observation Island, Gulf of Carpentaria. G. F. Hill (No. 637)' 

 21/10/11 



5. EVOLVULUS, Linn. 1763. 



(Camdenia, Scop., 1777 ; Cladostyles, Humb. & Bonpl., 1808 ; Leucomalla, 

 Phil. Sert. Mendoc, 1871 ; Meriana, Veil., 1825 ; Plesilia, Rafin., 1836.) 



1. E. alsinoides, Linn. — (E. linifolius, linn.) Near "Western Creek, G. 

 F. Hill (775), 16/2yi9'12. Driffield Creek, Gilrath and Spencer, July-August 

 1911. 60 milea N.E. of Clamp II., G. P. Hill (281), 7/6/1911. About 30 

 rodles N.W. of Twitchera Gap, Macdonnell Ranges, G. F. Hill (162), 

 10/5/1911. 



Islands of the Gulf of Oarpentaria, R. Broiwu ; North-west Coast, Bynoe, 

 Gregory's Expedition, etc. ; Victoria Eiver, and Arnhenx's Land, F. v. M. ; 

 Port Essington, Armstrong, A. Cunningham; in the interior, M'Douall 

 Stuaxt's Expedition. 



6. IPOMOEA, Linn., R. Br. 



(Pharbitis, Batatas, Calonyction, Skinnera.) (Aniseia, Choisy, 1833 ; 

 Apopleumon, Rafin., 1836 ; Bombycospermum, PresL, 1831 ; Calboat, Cav., 

 1799 ; Calycanthemum, Klotzsch., 1861 ; Clitoeyamos, St. Lag., 1880 ; Convol- 

 vuloides, Moench., 1794 ; Elythrostamna, Boj., 1837 ; Euryloma, Rafin., 1836 ; 

 Exogonium, Choisy, 1833 ; Leptocallis, G. Don., 1837 ; Macrostema, Pers., 

 1805 ; Marcellia, Mart., 1844 ; Mina, Cerv., 1824 ; Morenoa, La Llave, 1824; 

 ML, Medic, 1791 ; Operculina, Silva, 1836 ; Piptostegia, Reichb., 1841 , 

 Quamoolit, Moench., 1794 ; Trivolvulus, Moc. and Sesse., 1845. 



Series I. — Digitatae. Leaves digitately divided into deep lobes or 

 distant segments or leaflets. Flovi'ers of the Speciosae, or rarely of the Cam- 

 panulatae. 



Leaves paimajtely or almost pedately Leveral-lobed. Flowers large in 

 loose cymes. — 20. I. paniculata. 



Leaves divided into 3 (or 5?) distinct obovate lobed segments. Flowers 

 rather large. Plant stellate-tomentose. — 7. I. Davenporti. 



Leaves divided into 5 or 7 ovate or lancelate cntiie _egments. Flowers 

 large. Plant glaibrous or hairy. — 21. I. quinata. 



Leaves divided into 3 to 7 Imear usually pinnatifid segments. 



Corolla nearly 2 in. long. Ovary 2-oelled. — 9. I. diversifolia. 

 Corolla scarcely \ in. long. Ovary 3-celled. — ^8. I. dissecta. 



Series II. — Pharbitides. Leaves emtire or 3-lobed. Ovary usually 3-celled. 

 Sepals usually long and narrow. Corolla of the Speciosae. — 15. I. hederaeea. 



Series HI. — Calycinae. Leaves entire or lobed at the base. Ovary 

 2-oelled. Sepals large, obtuse (attaining | to 1 in. after flowering). Corolla 

 large (1| to 3 in. long). 



Glabrous or nearly so. Dracteoles small. bepaJs very large. Corolla 

 broadly campanulate, about 2 in. long. — 2. I. alata. 



Glabrous or sparingly pubescent. Bracteoles small. Corolla about 3 in. 

 long, contracted into a tulbe at the base. 



Leaves acuminate. Outer sepals rather longer than the others.— 



18. I. longiflora. 

 Leaves very obtuse, almost reniiform. Outer sepals rather smaller 

 than the others. — 6. I. costaita. 

 Seiries IV. — Speciosae. Leaves ent'rc, toothed or lobed at the base. Ovary 

 2-celled or spuriously 4-celled. Sepals moderiate or small (rarely attaining 

 i in.). Corolla large (IJ to 3 in. long), often more or less tubular at the 

 base, usually pink, purple, or white. 



