SAXIFRAGACEjE. X. HEUCHERA. XI.DoNATiA. XII. LEPUROPETALUM. XIII. VAHLIA. 



231 



longer than the calyx ; stamens not exserted. Tf. . H. Native of 

 North America, on the Rocky Mountains. Tiarella ? bracteata, 

 Torrey in ann. lye. 2. p. 204. Habit of a species of Saxifraga. 

 Bracteate-Qowered Heuchera. PI. 1 foot. 



14 H. LONOIPE'TALA (Moc. pi. nootk. ined. with a figure, ex 

 D. C. prod. 4. p. 52.) scape pubescent ; panicle secund ; petals 

 linear, revolute at the apex, longer than the calyx. I/. H. 

 Native of the north-west coast of America. Lobes of leaves 

 broad, rather distinct, acutely toothed. Petals and styles white. 



Long-petalled Heuchera. PI. 1 foot. 



15 H. ACERIFOLIA (Rafin. med. fl. 1. p. 211. t. 49.) petioles 

 hairy ; leaves smooth, glaucous beneath, acutely 5-lobed, un- 

 equally toothed : teeth mucronate ; scapes smooth ; panicle 

 elongated, loose ; petals short; stamens exserted. 2/.H. Na- 

 tive of North America, on hills and in the fissures of rocks, in 

 Kentucky, Tennessee, and west of Virginia, Maryland, and 

 Ohio, &c. 



Maple-leaved Heuchera. PI. 1 foot. 



16 H. SQ.UAMOSA (Rafin. med. fl. p. 244.) petioles pilose ; 

 leaves rather hairy, ciliated, cordate, acutely 7-lobed, denticu- 

 lated, glaucous beneath ; scape pilose, furnished with distant 

 oval scales; panicle short, oval, crowded, scaly; pedicels short; 

 lobes of calyx obtuse; stamens exserted. 1. H. Native on 

 the mountains of Maryland, Virginia, and Kentucky. Perhaps 

 the same as H. bracteata. 



Scaly Heuchera. PI. 1 foot. 



Cult. The species of Heuchera thrive in any light garden 

 soil, and are readily increased by dividing at the roots. None of 

 the species are showy. 



XI. DONA'TIA (so named by Forster from Vitaliano Do- 

 nati, of Padua, professor of botany at Turin). He travelled into 

 Egypt and Arabia, and died on his journey). Forst. gen. t. 5. 

 Juss. gen. p. 300. St. Hil. mem. mus. 2. p. 119. D. C. prod. 

 4. p. 53. 



LIN. SYST. Tridndria, Trigynia. Tube of calyx turbinate, 

 adnate to the ovarium ; limb truncate, with 2 triangular acumi- 

 nated nearly opposite teeth". Bracteoles linear, adnate to the 

 tube of the calyx. Petals 9 (f. 52. e.), (8-10 ex Forst.) linear- 

 oblong. Stamens 3 (f. 52. f.), short, alternating with the petals. 

 Styles 3 (f. 52. b.) -5, filiform. Ovarium 2-3-celled. Ovula 

 numerous, fixed to the top of the cells. Fruit capsular. A 

 nearly stemless herb, with the 

 habit of Saxifraga ccespitbsa. 

 Stems tufted. Leaves alternate, 

 linear, obtuse, permanent, im- 

 bricated, thick, glabrous, woolly 

 in the axils. Flowers terminal, 

 sessile, solitary, white. Perhaps 

 the petals are 6, and the stamens 

 6, 3 of them antheriferous, and 

 the other 3 converted into petals. 



1 D. MAGELLA'NICA (Forst. 1. 

 c.) If. . F. Native of the Straits 

 of Magellan, on humid rocks. 

 Lam. ill. t. 51. Polycarpon Ma- 

 gellanicum, Lin. fil. suppl. 115. 



Magellan Donatia. PI. ft. 



Cult. This plant will require to be grown in a small pot, 

 well drained, in a mixture of sand, peat and loam ; and placed 

 among other alpine plants. It will be easily increased by 

 dividing. 



XII. LEPUROPE'TALUM (from \tirvpiov, lepurion, a lit- 

 tle scale, and irtraXoi', petalon, a petal ; in reference to the small 

 scale-formed petals). Elliot, sketch 1. p. 370. D. C. prod. 4. 

 p. 53. 



FIG. 52. 



LIN. SYST. Pentdndria, Trigynia. Calyx 5-parted, perma- 

 nent : lobes ovate, obtuse. Petals 5, permanent, scale-formed, 

 inserted in the calyx, and alternating with its segments. Stamens 

 5, alternating with the petals. Ovarium free at the apex. Styles 

 3, short, rather concrete at the base. Capsule 1 -celled, 3-valved 

 at the apex. Seeds numerous, oval, fixed to the inflexed mar- 

 gins of the valves. An annual glabrous branched tufted herb. 

 Leaves alternate, sessile, spatulately lanceolate, obtuse, entire. 

 Flowers terminal, solitary, small, white. 



1 L. SPATULA'TUM (Ell. 1. c.) 11. F. Native of North Ame- 

 rica, in Georgia, in shady places. Pyxidanthera spatulata, 

 Muhl. cat. 



Spatulate-\ea\e& Lepuropetalum. PL ^ foot. 



Cult. See Donatia above for culture and propagation. 



XIII. VA'HLIA (in honour of Martin Vahl, a pupil of Lin- 

 neus, regius professor of botany at Copenhagen, and member of 

 several academies, author of Symboliae Botanicae, Eclogae Ameri- 

 canae, &c. and one of the editors of Flora Danica). Thunb. gen. 

 nov. 2. p. 36. with a figure. Juss. gen. p. 318. Poir. diet. 8. 

 p. 284. Lam. ill. t. 183. R. Br. in Frankl. narr. journ. 766. 

 D. C. prod. 4. p. 53. Bistella, Caill. and Delil. but not of 

 Adans. Oldenlandia species, Retz, Roth, Smith, but not of Lin. 



LIN. SYST. Pentdndria, Digynia. Tube of calyx adhering to 

 the ovarium : limb 5-parted, permanent, valvate in aestivation. 

 Petals 5, spreading, undivided, shorter than the calyx. Stamens 

 5 : anthers versatile. Styles 2, capitate at the apex. Capsule 

 1-celled, 2-valved, truncate at the apex, 5-furrowed, crowned by 

 the limb of the calyx, many seeded ; placentas loose, hanging 

 from the top of the cavity of the cell. Seeds convex on the 

 outside, and concave on the inside. Rather villous somewhat 

 dichotomous herbs. Leaves opposite, exstipulate, linear or lan- 

 ceolate. Flowers white, axillary, pedicellate ; pedicels twin, 1- 

 flowered, short. 



* African species. 



1 V. CAPE'NSIS (Thunb. fl. cap. p. 246.) leaves linear or nar- 

 row-lanceolate ; branches velvety at the top ; pedicels twin, 1- 

 flowered ; styles exserted ; capsules oblong. I/ . G. Native of 

 the Cape of Good Hope. Russelia Capensis, Lin. fil. suppl. p. 

 175. Plant almost with the habit of a Silene, from -J to 1 foot 

 high. Flowers white. 



Cape Vahlia. PI. to 1 foot. 



2 V. WELDE'NII (Reich, hort. hot. t. 91.) leaves ovate, acute; 

 pedicels twin, 1 -flowered ; capsule globose. . H. Native of 

 Upper Egypt, of Nubia near Dongolah ; and of Senegal. Bis- 

 tella geminiflora, Caill. and Delil. pi. afr. p. 97. t. 63. f. 2. A 

 much branched herb, beset with glandular hairs. Flowers white. 



Welden's Vahlia. PI. | to | foot. 



3 V. RAMOSISSIMA (Alph. D. C. diss. ined. ex D. C. prod. 4. 

 p. 54.) stem much branched, hairy : hairs bearing viscid glands 

 at the apex ; leaves linear, pubescent ; peduncles 2-flowered, 

 shorter than the leaves; capsule ovate. Q. H. Native of 

 Senegal. Flowers white. Habit of a Silene or Areniiria. 



Much-branched Vahlia. PI. \ to ^ foot. 



4 V. SILENOIDES (Alph. D. C. diss. ined. ex D. C. prod. 4. 

 p. 54.) stem branched, clothed wilh soft hairs ; leaves linear, 

 pubescent; peduncles 2-flowered, shorter than the leaves ; cap- 

 sule globose. O- H. Native of the Cape Verd Islands. 

 Flowers white. 



Catchfly-like Vahlia. PI. foot. 



5 V. TOMENTOSA (Alph. D. C. diss. ined. ex D. C. prod. 4. p. 

 54.) stem branched, tomentose ; leaves linear-lanceolate, rather 

 hairy ; peduncles 2-flowered, shorter than the leaves : flowers 

 on short pedicels ; capsule nearly globose. Q.I H. Native of 

 the north of Africa, in the kingdom of Cayor. Flowers white. 



