534 cxxii. EUPHORBiACEiE (brown). [Eup^iorhia. 



Tithymalus schimperiamts, Klotzsch & Garcke in Abh. Akad. Berlin, 

 18G(), 96; Schweinf. Beitr. Fl. Aethiop. 40; Penzig in Atti Congr. 

 Bot. Geneva, 1892, 360. T. dilataius, Klotzbch & Garcke, I.e. 89. 

 7\ hoclisteUerianus, Klotzsch tt Garcke, i.e. 97. 



Ifile Ziand. Sudan : Sennar, Broun, 798 ! Eritrea : various localities, 

 Schtoeinfurth Sf Riva, 1H4, 211, 342, 343, 977, 1172, 1441, 1572! 1899! 2035, 

 2061 ! Stetidner, 550 ! Abyssinia : near Adowa, Schimper, 274 ! Addi Dschoa, 

 Schimper, 511! near Enschedcap (Intjatkab), Schimper, 543; Amba Sea, Schimper, 

 582 ! near Jelajeranne, Schimper, 1706 ! between Harrar and Addi Abbaba, Wellby ! 

 Shashago District, Wellby ! Ankober, Roth, 51 ! and without precise locality, 

 Flowden! Petit, 96! Schimper, 971! Gallaland, Ellenheck, 417! 1378! 1712! 

 Somaliland, Donaldson- Smith, 225 ! between Oi and Jaribule, Riva, 1195 ! Uganda : 

 Entebbe, Bagshawe, 740 ! British East Africa : Man, Scott-Elliot, 6827 ! Kikuyu, 

 Eldama Ravine and other localities, Whyte ! Alngaria, Gregory ! 



Mozaxnb. Distr. German East Africa : Kilimanjaro, 10,000 ft., Johnston ! 

 Meyer, 124! Volkens.lbZQ ! Engler, 1834! Uhlig, 621 ! 1115! Usambara, Braun, 

 2856a! 2856b! Xgaruka, Uhlig, 345; Lake Mohasi, Mildbraed, 648! British 

 Central Africa:' Nyasaland ; Nyika Plateau, 6000-7000 ft., Whyte! Ntondwe, 

 Cameron, 142 ! Zomba and vicinity, Whyte ! Blantyre, Buchanan, 162 ! 209 ! and 

 without precise locality, Buchanan, 31 I 116! 978! Rhodesia; near Chirinda, 

 Swynnerton, 1531 ! 



Also in Arabia. 



Var. Buchanani, N. E. Br. Branches and leaves glabrous. Ovary and capsule 

 pilose or villous-tomentose witli rather long spreading white hairs; otherwise as in 

 the type. — E. Buchanani, Pax in Engl. Jahrb, xxviii. 27. 



Mozamb. Dlstr. British Central Africa : Nyasaland ; between Shibisa and 

 Tsbinmuzo, Kirk ! Blantyre, Buchanan ! Portuguese East Africa : Gazaland ; 

 Inyamadzi Valley, Swynnerton, 1532 ! Chirinda Forest, Swynnerton, 238 ! 



Var. velutina, N. E. Br. Branches, leaves, ovary and capsule more or less pilose- 

 pubescent to subtomentose, GLmds (even on the same involucre) with or without 

 horns. Otherwise as in the type. — E. velutina. Pax in Engl. Pfl. Ost-Afr, C. 242, 

 and Engl. Jahrb. xxiii. 535, not of Greene. 



Mozamb. Dlstr. German East Africa: Kilimanjaro; Marangu, Volkens, 

 587 ! Meru Mountain, Merker, 590 ! Kibosho, Volkens, 1665 ! Moshi, Merker, 603 ! 



As in the case of most annuals there is a very great diversity of appearance among 

 the specimens above quoted and several species have been founded upon this varia- 

 tion. In the large series of specimens examined, I find every gradation from small 

 6 in. -high Arabian and Abyssinian examples to others of 4 ft. high which occur in 

 Abyssinia, Nyasaland and elsewhere; but allowing for size and luxuriance, I can find 

 no structural difference whatever to separate them. The involucre-glands vary very 

 much in the length of tlieir horns sometimes on the same plant or even on the same 

 involucre, and 1 am very doubtful if E. longecornuta is anything more than a mere 

 form of E. schimperiana with unusually long horns, as there seems to be no other 

 distinction. Boissier has distinguished E. monticola and E. dilatata from 

 E. schimperiana by the filaments of their stamens being glabrous instead of 

 pubescent, as well as by trifling vegetative characters that are inconstant, but in 

 several cases I have found glabrous and pubescent filaments in the same involucre. 

 All the specimens seen have small dormant buds in the axils of the fallen leaves on 

 the main stem, and in some cases these seem to grow out, so that a second time of 

 flowering on the same stem takes place, therefore the plant is probably sometimes 

 biennial. 



