Plumbago.'] LXXVII. PtUMBAGINEiE (OLIVER). 487 



2. p. amplexioaulls, Olw. in Jov/rn. Linn. Soc. xv. 96. Branches 

 puberulous or glabrate, longitudinally snlcate. Leaves 2-5 in. long, 

 obovate-elliptical, broadly pointed, glabrous, continued below into the 

 broadly alate petiole, which is conspicuously auricled at base. Flowers 

 blue, in panicular spikes. Bracts ovate, shortly apiculate. Calyx 

 costate, puberulous, sparingly glandular, ^-J in. long. Corolla-lobes 

 raucronate with the produced apex of the slender median nerve. An- 

 thers exserted. 



Sontli Central. Region about Lake Tanganyika, Cameron f 



Not identified from elsewhere. 



3. CERATOSTIGMA, Bunge ; Benth. et Hook. fil. Gen. Plant, ii. 



p. 628. 



Differs from Plumbago in the eglandular calyx ; stamens adnate, 

 half the length of the tube of the corolla ; and the capitate rather than 

 spicate flowers. 



A small genus of temperate Asia and Abyssinia. Our species is peculiar to this 

 Flora, though nearly allied to a Himalayan one. 



1. C. abyssiiilcuin, Asch. in Schweinf. et Asch. Enum. p. 288. 

 A shrub of 3-5 ft., with sulcate appressed- setose rigid somewhat zig- 

 zag branches. LeaVes oval or lanceolate, acute, narrowed to the base, 

 setulose above and beneath and setose- ciliate, sessile or shortly 

 petiolate, 1-1 J in. long or smaller. Heads terminal, several- 

 flowered. Bracts broadly ovate, cuspidate-acuminate, setulose and 

 with a few long marginal bristles. Calyx tubular, acutely 6-lobed, 

 strongly S-costate ; ribs smooth ; intercostal spaces setulose. Corolla 

 "violet " or " rose; " tube half as long again as calyx ; segments of 

 limb '' oblong." — Valoradia abyssinica, Hochst. ; Boiss. in DC. Prodr. 

 xii. 695 ; Y. patula, Hochst. 1. c. et in Flora, 1842, p. 240 (with gla- 

 brate stem and leaves more glabrous above). 



anie Xiand. Abyssinia, Sckirnper! Kretschmer. 



Oeder LXXVIII. PRIMULACEiE. (By Prof. Oliver.) 



Flowers regular, hermaphrodite. Calyx free or more or less ad- 

 nate to the ovary below {8amolus) 5-fid or 4-5-partite in our species. 

 Corolla hypogynous (when the ovary is free), rotate or subcampanu- 

 late, 4-5-fid or -partite, or hypocrateriform, with a spreading 5-partite 

 limb. Stamens as many as corolla-lobes, inserted upon the tube or 

 lobes, opposite to the lobes. Ovary free (except in Samolus), 1-celled, 

 with a free central placenta and indefinite ovules. — Herbs. Leaves 

 radical or cauline, exstipulato. Inflorescence various. 



A small Natural Order, most numerous in the cooler regions of the north tempe- 

 rate zone. 



Corolla imbricate. Ovary free. 



Leaves radical, crolla hypocrateriform 1. Primula. 



Leaves alternate. Corolla campanulate 2. Ardisiandra. 



Corolla contorted, rotate or infundibuliform. 



Capsule dehiscing longitudinally 3. Ltsimachta. 



