534 CXXII. EUPHORBIACEZ (BROWN). | Huphorbia. 
Tithymalus schimperianus, Klotzsch & Garcke in Abh. Akad. Berlin, 
1860, 96; Schweinf. Beitr. Fl. Aethiop. 40; Penzig in Atti Congr. 
Bot. Genova, 1892, 360. TZ. dilatatus, Klotzsch & Garcke, le. 89. 
T. hochstetterianus, Klotzsch & Garcke, l.c. 97. 
Wile Land. Sudan: Sennar, Brown, 798! Eritrea: various localities, 
Schweinfurth & Riva, 164, 211, 342, 348, 977, 1172, 1441, 1572! 1899! 2035, 
2061! Steudner, 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, 
Plowden! Petit, 96! Schimper, 971! Gallaland, Ellenbeck, 417! 1378! 1712! 
Somaliland, Donaldson-Smith, 225! between Oi and Jaribule, Riva, 1195! Uganda: 
Entebbe, Pagshawe, 740! British East Africa: Mau, Scott-Elliot, 6827! Kikuyu, 
Eldama Ravine and other localities, Whyte ! Alngaria, Gregory ! 
Mozamb. Distr. German East Africa: Kilimanjaro, 10,000 ft., Johnston! 
Meyer, 124! Volkens,1539! Engler, 1834! Uhlig, 621! 1115! Usambara, Braun, 
28564! 28568! Ngaruka, 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! 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 with rather long spreading white hairs; otherwise as 
the type-—E. Buchanani, Pax in Engl. Jahrb. xxviii. 27. 
Mozamb. Distr. British Central Africa: Nyasaland; between Shibisa and 
Tshinmuzo, 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. Glands (even on the same involucre) with or without 
horns, Otzerwise as in the type.—Z. velutina, Pax in Engl. Pfl. Ost-Afr. C. 242, 
and Engl. Jahrb. xxiii. 535, not of Greene. 
Mozamb. Distr. German East Africa: Kilimanjaro; Marangu, ces 
587 ! Meru Mountain, Merker,590! Kibosho, Volkens, 1665! Moshi, Merker, 603 - 
Asin 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 pier 
tion. In the large series of specimens examined, I find every gradation from er 
6 in.-high Arabian and Abyssinian examples to others of 4 ft. high which occur r 
Abyssinia, Nyasaland and elsewhere ; but allowing for size and luxuriance, I can fin 
no structural difference whatever to separatethem. The involucre-glands vary very 
much in the length of their horns sometimes on the same plant or even on the samé 
involucre, and 1 am very doubtful if Z. longecornuta is anything more than & re 
form of E. schimperiana with unusually long horns, as there seems to be 29 ee 
distinction. Boissier has distinguished E. monticola and £. cone a al 
E. schimperiana by the filaments of their stamens being glabrous pees in 
pubescent, as well as by trifling vegetative characters that are inconstant, as 
several cases I have found glabrous and pubescent filaments in the same mv0 uc : 
All the specimens seen have small dormant buds in the axils of the fallen leaves ‘ 
the main stem, and in some cases these seem to grow out, so that a second time 
flowering on the same stem takes place, therefore the plant is probably sometimes 
biennial. 
