69. SANTAIACEiE. 70. AEISTOLOCHIACEiE. 305 



Order LXLK. SANTALACE^. 



Periantli adnata to the ovary ; limb 3 — 5-fid ; a9stivation val- 

 vate. Stam. 3 — 5, opposite to and inserted at the base of the 

 segments. Ovary 1-oelled ; ovules 1 — 4, pendulous from near 

 the apex of a central placenta. Style 1. Fr. drupaceous, 

 1-seeded. Embryo in the axis of fleshy albumen. — No stipules. 



1. Thbsium. Perianth 4 — 5-cleft, top- or funnel-shaped. 

 Stam. 5, with n fascicle of hairs at their base. Style 1. 

 Stigma simple. Nut drupaceous, crowned with the per- 

 sistent perianth. 



1. Thp/si-om Linn. 



1. T. humifHsum (DO.) ; st. procumbent or ascending race- 

 mose, racemes branched or simple, fl. -stalks as long as or longer 

 than the fl., fr.-stalks patent, angles of fr. -stalks and edges of 

 bracts and upper 1. denticulate-asperous, fr. oval-oblong, 1. 1- 

 veined linear. — B. xi. 542. T. Unophyllum Sm. E. B. 247. — 

 Parasitical. Root woody. St. nearly always prostrate, spread- 

 ing in a circle. L. very slender ; veins usually obscure. Bracts 

 3, lower middle ones exceeding flowers. Perianth-tube veiy 

 short, open, funnelsLaped; segin. triangular, spreading, a tooth 

 on each side. Fr. ovoid, longer than the persistent perianth 

 which is usually inflexed only at the end, strongly ribbed, 

 slightly netted. — Chalky and limestone (oolite) tiilla . P. VI. 



vri. E. 



[ T. humile (Vahl) ; racemes a^ikei,Jl.nearly sessile, fr. strongly 

 ribbed and netted sessile crowned with the very short inflexed 

 perianth, l.Jleshy linear l-veiued. — R. xi. 542. — Fr. 4 or 5 times 

 as long as the persistent inflexed perianth. Middle bract much 

 exceeding the flowers. — I gathered two specimens of this plant 

 near Dawlish, Devonshire, in 1829. P. VII. VIII.] E. 



Order LXX. ARISTOLOCHIACE^. 



Perianth adnate to the ovary below, tubular above, with a 

 lobed dilated usually irregular limb. Stam. 6 — 12, epigynous. 

 Ovary 3 — 6-celled. Style simple ; stigma radiant. Fr. many- 

 seeded. Seed with a minute embryo at the base of fleshy albu- 

 men. — ^No stipules. 



[1. Abistolochia. Perianth tubular, swelling at the base ; 

 mouth dilated on one side. Anth. 6, adnate to the short 

 columnar style under the 6-lobed stigma. Caps. 6-ceIled.] 



3. AsAEUM. Perianth bellshaped, 3-fid. Stam. 12, inserted 

 at the base of the style. Anth. attached to the middle of 

 the filaments. Stigma 6-lobed. Caps, 6-celled. 



