325 



XCII. EUPHOEBIACEJ]. 



Flowers separate (but in Euphorbia the barren flowers are placed round the single fertile 

 fljower, so as to give some appearance of a single complete flower). Perianth inferior, sometimes 

 wanting. Ovary usually 3-celled, with one or two suspended seeds in each cell. 



714. CROTON. 



1. tinctorum. L. ovato-rhomboid, re- 

 pand, entii'e at base, hoary on both sides. Fer- 

 tile Fl. on stalks, generally forked, at the base 

 of barren spikes. Caps, squamato-pubescent, 

 di-ooping. a. 7, 8. Coasts of Mdt. Fl. 

 yellow. 



715. EICINUS. 



1. communis. L. peltato-palmate. Segm. 

 lanceolate, serrate. Stigmas 3, forked. Caps, 

 pricldy. S. 5, 6. Rich moist thickets on the 

 coast. Sic. 



2. africanus. L. peltato-palmate. Lobes 

 lanceolate, dentato-serrate. Stigmas 6. Caps. 

 prickly. S. 4-6. Bushes on coast. Messina. 

 — Guss. 



716. BUXUS. 



1. sempervirens. L. ovate. Stalks hairy 

 on the margin. Anthers ovato-sagittate. S. 



4, 5. Dry calc. hills. Eug. rare. m. and s. 

 Europe. 



717. ANDRACHNE. 



1. telephoides. Stems procimibeut. L. 

 stalked, ovate, shortly acuminate, smooth, a. 



5, 6. Open barren. Isl. of Brioni. 



718. EUPHORBIA. 



The habit of the species of Euphorbia often 

 depends a good deal on the number of the L. ; 

 but individuals vary considerably in this respect, 

 and vary so gradually, that we cannot make all 

 the use of this character which might have been 

 expected. I have, however, noticed this in 

 many instances ; calling the L. scattered, when 

 those on the middle of the flowering-stem are 

 usually more than one-third of the length of 

 the L. apart ; approximate, when from one- 

 third to one-eighth ; and crowded, when this 

 space is less than one-eighth of the L. In the 

 lower part of the stem the L. are usually shorter 

 than the others ; in the upper part the spaces 

 are longer. Where there are barren shoots, 

 the L. upon them are always closer together. 

 The L. in the alternate-leaved Euphorbias are 

 generally unequally spaced, which adds to the 



difficulty of resting on this character. In the 

 annual species the L. often faU off while the 

 plant is in flower. In others, only the lower 

 L. faU off. 



A. L. with stipules, opposite. Flowers axil- 

 lary. Sp. 1-4. 



B. L. without Stipules, alternate. Flowers 

 in a sort of umbel. Bracts separate. Glands 

 entire. 



i. Seeds reticulate or pitted. Sp. 5, 6. 



ii. Seeds rough with raised points. Sp. 7, 8. 



iii. Seeds smooth. Capsule sessile. Sp. 9. 



iv. Seeds smooth. Capsule stalked. 



a. Capsule warty. 



* Rays of Umbel 3-6. 



t "Warts not filamentous. 



% Root annual. Sp. 10-13. 



J:}: Root perennial. Plant herba- 

 ceous. Sp. 13-20. 



%XX Plant shrubby. Sp. 21, 22. 



ft Warts filamentous. Sp. 23-25. 



** Rays more than 6. Sp. 26. 



b. Capsule without wai'ts. Sp. 27-30. 



G. Bracts united. Glands various. Other- 

 wise as B. Sp. 31-36. 



D. Glands horned. Otherwise as B. 

 i. Seeds smooth. 



a. Capsule with raised points on the 

 back. 



* Rays more than 5. Sp. 37-43. 

 ** Rays 3-5. Sp. 44-47. 



b. Capsule quite smooth. Sp. 48-54. 

 ii. Seeds not smooth. 



a. Capsule not smooth. Sp. 55-62. 



b. Capsule smooth. 



* Plants annual. Sp. 63-66. 

 ** Plants shi-ubby. Sp. 67, 68. 



"SL. L. opposite, without Stipules. Sp. 69. 



A. L. with Stipules! Plant annual. Stem 

 forked. L. opposite. Capsule smooth. 



1. Preslii. Seeds wrinkled. Fl. clustered, 

 terminal. Stem neai'ly erect. L. oblong, a. 

 6-8. Cult. Palermo, Termini, Sic. 



