Zasiosiphon,'] thymeL/EACE.-e (Wright). 69 ' 



IX. LASIOSIPHON, Fresen. 



Floicers hermaphrodite, 5-merous. Cahjx-tule slendei-, hairy out- 

 side, often with longer hairs in the lower part, circumscissile above 

 the base ; lobes patent. Petals 5, membranous, smaller than the 

 calyx-lobes, sometimes minute, rarely absent, entire or divided. 

 Stamens 10, in two series; anthers subsessile, dnrsifixed near the 

 base, linear or oblong, obtuse. Hypogynous disc none or very sniall. 

 Ovary 1-celled ; style slender; stigma capitate or small. Fruit dry, 

 small, enclosed in the persistent base of the calyx. Seeds with 

 scanty albumen or none ; cotyledons rather thick. 



Small or large shrubs ; leaves opposite or alternate ; flowers in terminal sessile 

 or stalked heads or spikes. 



DiSTRiB. Species ahout 35, chiefly in Tropical and South Africa ; five or six 

 in Madagascar and one in India. 



Leaves linear-oblong, 2 lin. long, distant ( 1 ) microphyllus. 



Leaves much larger, longer than the internodes : 

 Calyx-tube 4-8 lin. long : 



Leaves more or less silverv tomentose ; 

 Tomentum persistently dense : 



Leaves lanceolate or oblauceolate, 6-12 lin. long ( 2 ) splendens. 



Leaves oblong-lanceolatCj 5 lin. long (3) canoargentea. 



Tomentum less dense in age (4) Burchellii. 



Leaves not silvery tomentose : 

 Branches spreading : 



Leaves glabrous, oblong, acute ...(5) Wilmsii. 



Leaves glabrous, oblong, obtuse ... ... ( 4) Burchellii, var. 



glabrifolius. 



Leaves hispidulous, oblong, obtuse (6) deserticola. 



Leaves adpressed-silky, siiathulate, acute ... (7) macropetalus. 



Leaves adpressed-silky, spathulate-oblong, mu- 



cronulate ... , ( 8 ) dregeanus. 



Branches erect : 



Petals minute, tooth-like ( 9 ) similis. 



Petals 1 lin. long, oblong (10) linifolius. 



Calyx-tube 9-15 lin. long : 

 Flower-heads sessile : 



Leaves adpressed-silky on both surfaces : 



Petals tooth-like or obsolete (12) anthyUoides. 



Petals obvious : 



Calyx-tube spreading-pilose (11) polyanthus. 



Calyx-tube adpressed-pubescent (13) meisnerianus. 



Leaves glabrous : 



Leaves linear-lanceolate or subspathulate, 1J-2J 



lin. wide (1^) pulchellus. 



Leaves oblauceolate, 2^^ lin. wide (15) triplinervis. 



Leaves linear, 1 J lin. wide (16) caffer. 



Flower-heads distinctly stalked : n\ -u- - 



Petals lanceolate, acute (W Kraussu. 



.Petals oblong, obtuse (IS) lioepfneriauus. 



