464 xciii. orobanchace^e (stapf.). [Cista7iche, 



Sp. PI. ed. ii. 844 ; Brot. Fl. Lus. i. 184. Orobanche tinctoria, Willd. 

 Sp. PI. iii. 353. Phelipcea htlea, Desf. Fl. Atl. ii. 60, t. 146 ; Brunner 

 in Flora, 1840, ii. Beibl. 1 & 4; Boiss. Fl. Or. iv. 500. Ph. tinctoria, 

 Walp. Rep. iii. 462 ; Reut. in DC. Proclr. xi. 13. Ph. senegalensis, Reut. 

 I.e. Ph. lusitanica, Ooss. Not. Crit. Espagne, 43. Ph. Brunneri, 

 Webb in Hook. Niger Fl. 167. 



Upper Guinea. Senegambia: Cape Verde, and near N' Horo, Brunner ; sandy 

 shore near St. Louis, Roger ! and without precise locality, Sieber, 53 ! 



North Central. Southern Sahara : North of Lake Chad, common near Bel- 

 gaschit'ari, Vogel ! 



Nile Land. Nubia : coast region, * Schweinfurth, 56S ! Bent ! Singat, 



Schweinfurth, 310 ! by the Nile, at the 6th cataract, Schweinfurth, 717 ! Eritrea: 



near Acrur, 6300 ft.. Schweinfurth Sr Rivet, 1349 ! Sennar, Kotschy, 261 ! French. 

 Somaliland : Gulf of Tajura, Lord ! 



Also in Spain and throughout North Africa and the Orient to India. 



I am not certain whether Lord's Somaliland specimens actually belong to C. 

 lutea. They are rather small, with calyces 2^-3i lin. long and corollas up to 1-J-iiu 

 long. On the other hand, a fruiting specimen, collected by Hildebrandt (2583) 

 from Taita, in British East Africa, belongs very probably here. Our knowledge of 

 the species of Cistanche leaves much to be desired, and an examination of the 

 plants in the field is very desirable, particularly with respect to their variability. 



2. OROBANCHE, Linn. ; Benth. et Hook. f. Gen. PI. ii. 984. 



Calyx persistent, campanula/te, equally or unequally 3-5-dentate or- 

 3-5-fid or split to the base in front and on the back with the divisions 

 entire or 2-fid. Corolla tubular, often curved, with a more or less 

 widened throat ; limb more or less distinctly 2-lipped; upper lip entire, 

 emarginate or 24obed ; lower lip 3-lobed with raised folds between the 

 lobes. Stamens 4, diclynamous, included, inserted below the middle 

 of the tube ; filaments usually thickened at the base ; anthers often 

 coherent, cells parallel or slightly divergent and mucronate at the base. 

 Ovary 1-celled with 4 placentas, approximate or contiguous in pairs, 

 many-ovuled ; style curved or almost straight ; stigma funnel-shaped, 

 peltate or distinctly 2 lobed, lobes lateral. Capsule dehiscing in the- 

 median plane, 2-valved, valves often cohering by the persistent style. 

 Seeds very numerous, minute, subglobose ; testa foveolate. Embryo 

 minute, globose, consisting of a few cells, embedded in endosperm. — 

 Parasitic plants, destitute of chlorophyll, variously coloured, usually 

 more or less covered with gland-tipped papillose hairs. Stems succulent, 

 often bulbously thickened at the base, simple or branched, Leaves 

 reduced to scales. Flowers bracteate, with or without bracteoles, spicate 

 or racemose. 



Species 80-90, mainly in the temperate and warm-temperate regions of the 

 northern hemisphere. 



