3536 



ZANTEDESCHIA 



ZANTEDESCHIA 



A. Lvs. lanceolate. 



1. Rehmannii, Engler (Richdrdia Rehmannii, N. E. 

 Br.). PINK or ROSE CALLA. Dwarf perennial: Ivs. 

 lanceolate to long-lanceolate, unequal-sided, light green 

 and white-pellucid-dotted, petioled, equaling or exceed- 

 ing the peduncle and spathe, the petiole without bristles: 

 spathes about 4 in. long, erect, trumpet-shaped, with a 

 caudate tip 1 in. long: fr. an obovoid or depressed obtuse 

 1-2-celled berry. B.M. 7436. In Natal, where it is 

 native, the spathes are said to be dull rose without, rose- 

 purple within, with a dark crimson blotch at the base 

 inside. In cult, the spathes are white, with a faint rose 

 tinge to the back and margins. Var. speciosa, Hort., is 

 dwarfer and more robust than the type. 



AA. Lvs. sagittate or cordate. 



B. Foliage spotted. 



2. filbo-maculata, Baill. (Richdrdia dlbo-maculata, 

 Hook. f.). SPOTTED CALLA. Fig. 4028. Petiole short, 

 without bristles; blade 12-18 in. long, white-spotted all 

 over, hastate, 3-4 times longer than broad, acute, the 

 basal lobes widely spreading, triangular, obtuse or 

 acute, 3^-4 in. long: spathe trumpet-shaped, 4-5 in. long, 

 2 in. wide, dull creamy yellow or milk-white with a 

 blotch of crimson at the base. S. Afr. B.M. 5140. 

 I.H. 7:255. F.S. 21:2258. Will stand in the open in 

 frosty regions with good protection for the roots. Not of 

 much value except in botanical collections. 



3. Nelsonii, Hort. Allied to Z. albo-maculata: very 

 vigorous and floriferous, reaching 3-4 ft., the scape over- 

 topping the foliage: Ivs. sagittate, bright green, sprink- 

 led with pellucid dots or spots, as in Z. Elliottiana: 

 spathe scarcely spreading, the limb short, very pale 

 yellow with a purple blotch at the bottom. Not 

 recognized by monographers, and perhaps a synonym 

 or a form of some other species. In S. Calif, blooms only 

 in summer, after Z. Elliottiana is past. 



4. melanoleuca, Engler (Richdrdia melanoleuca, Hook. 

 f. R. Sprengeri, Comes). BLACK-THROATED CALLA. 

 Scape and petioles bristly below: Ivs. 6-12 in. long, 

 hastate-ovate-acuminate, the basal lobes obtuse, 



marked all over with 

 oblong, white, trans- 

 lucent spots: spathe pale 

 straw - colored, widely 

 flaring and open from 

 the base, the margins 

 and cuspidate tip recurv- 

 ing, with an ample black- 

 purple spot at the base 

 within. Natal, 1868. B. 

 M. 5765. Var. tropicalis, 

 Engler (Richdrdia mela- 

 noleuca var. tropicalis, 

 N.E. Br.), of Trop. Afr.. 

 differs in larger size and 

 absence of bristles at 

 base of petiole. 



5. Elliottiana, Engler 

 (Cdlla Elliottiana, 

 Knight. Richdrdia Ettiob- 

 tiana, W. Wats.). GOL- 

 DEN CALLA. Lvs. gla- 

 brous; petiole 2 ft. or 

 more long, lacking brist- 

 les, more or less mottled; blade ovate or orbicular-ovate, 

 cordate at base, obtuse but subulate-pointed at apex, 

 light green, with a few white or translucent spots, with 

 undulate margins, about as large as those of Z. sethiop- 

 ica: spathe a rich lustrous yellow, lasting about two 

 weeks, becoming greenish with age, not purple-blotched, 

 about 6 in. long: berries about %in. diam., nearly 

 globose, green: tuber proliferous. Afr., probably in 

 Trop. Transvaal. B.M. 7577. Gn. 46:446. Gn. W. 11: 

 553. R.H. 1904:136. 



4031. Zantedeschia athiopica var. 

 minor, Little Gem. ( X K) 



BB. Foliage without spots. 

 C. Base of the If. -blade cordate. 



6. aethiopica, Spreng. (Cdlla sethibpica, Linn. Colo- 

 cdsia sethibpica, Spreng. Richdrdia sethibpica, Hort. R. 

 africana, Kunth). COMMON CALLA. LILY-OF-THE- 

 NILE. Fig. 4029. Stout robust plant: Ivs. smooth, the 

 petiole without bristles; blade about twice as long as 

 wide, broad or narrow but cuspidate at the apex, cor- 

 date-sagittate at the base, both Ivs. and spathes vary- 

 ing greatly in size: spathe 3-10 in. long, white, creamy 

 inside at the base, flaring outward and narrowing to a 

 cuspidate tip. S. Afr. B.M. 832. Gn. 33:584. Gn.W. 

 2 1 : 73 . Fragrant . Sports with double and triple spathes 

 Often occur. A.F. 5:83. Gn. 46, p. 447. See Fig. 4030. 



Var. minor, Engler (R. ndna compdcta, Hort.). 

 LITTLE GEM. Fig. 4031. Like the type, but only 12-16 

 in. high: spathes 3-4 in. long. Var. devoniensis, Hort. 

 (R. devoniensis, Hort.). Dwarf; freer bloomer than 

 Little Gem, and more fragrant. 



There are many forms of the calla lily in cult., a 

 number of which have received Latin names. Some of 

 these horticultural names are candidissima, spathe 

 large, pure white; gigantea, plant very large; Gode- 

 freyana, dwarf, white; grandiflora, spathe large; Childsi- 

 Sna, dwarfer and more compact than type and more 

 floriferous. 



7. macrocarpa, Engler (Richdrdia macrocdrpa, W. 

 Wats. R. Pentlandii, Whyte. Cdlla Pentlandii, 

 Whyte. Z. Pentlandii, Hort.). Erect perennial: Ivs. 

 ovate-cordate, acuminate-caudate, with an open sinus, 

 basal lobes rounded; midrib thick: spathe golden 

 yellow, broadly trumpet-shaped, its lower margins 

 convolute one-third, flaring above, the subulate tip 

 abruptly recurved, margins recurved, slightly warty and 

 with a black-purple blotch at the base within. Basuto- 

 land, S. Afr. B.M. 7397. Hooker writes (in B.M. 

 7397) that "R. Pentlandii is much the largest-leaved 

 species, and] is the only one with a deeply gamboge 

 yellow spathe within, which is much the largest and 

 broadest of any." First flowered in 1892 by R. Whyte, 

 Pentland House (Lee, England). 



cc. Base of the If. -blade hastate. 



8. oculata, Engler (Cdlla oculdta, Lindl. Richdrdia 

 hastata, Hook. f. Z. hastata, Engl. R. Lutwychei, 

 N. E. Br. Z. Lutwychei, Dur. & Schinz.). PRIDE 

 OF THE CONGO. YELLOW CALLA. Petioles 12-18 

 in. long, usually or always bristly below; blades dull 

 green, hastate-ovate, twice longer than wide, rather 

 flaccid, 8-16 in. long, cuspidate at the apex, basal lobes 

 separated by a narrow sinus or overlapping and very 

 obtuse: spathe cup-shaped, 4-5 in. long (with a tail 1 

 in. long), greenish yellow, the tip erect, black-purple at 

 the base within, the lateral nerves usually rather 

 prominent above. Cent, and S. Afr. B.M. 5176. Gn. 

 18:596. 



Most of the garden forms have been named under Richardia 

 rather than under Zantedeschia; in the following list R=the 

 former and Z the latter. R. Adlamii, Hort. Leichtlin. Strong- 

 growing, with Ivs. sagittate, bright green, and somewhat exceeding 

 the scape: spathe short and rather open, creamy white with a 

 black or purple throat. Trop. Afr. Distributed by Max Leichtlin 

 (Germany) in 1898. There are hybrids of this and Z. Elliottiana. 

 Z. angustiloba, Engler (R. angustiloba, Schott. Z. chloroleuca, 

 Engler & Gilg). Lvs. glabrous, without spots, the petiole without 

 bristles; blade hastate, narrow, the basal lobes one-fourth the 

 length of the apical one, 20 in. long, 3 in. wide at the base: peduncle 

 4-4 }4 ft. long: spathe about 4 in. long, sulfur-yellow, red inside 

 at base. Angola. R. aurata, Hort., said to be a hybrid of Z. 

 albo-maculata X Z. hastata (oculata): Ivs. spotted: spathes large, 

 yellow. R. cantabrigiensis, Lynch=Z. Elliottiana X R. aurata or 

 Z. Rehmannii X Z. Elliottiana. R. intermedia, Hort. Very free- 

 flowering: If.-stalks bright green, marbled with white and rose: 

 spathe very dark yellow, with small black blotch at the base. R. 

 Lathamiana, Hort.=Z. Elliottiana X Z. albo-maculata. "R. 

 suffusa. A distinct dwarf-habited plant with a creamy white spathe, 

 the base in the inside of a rich violet-purple shade. It is apparently 

 a plant of good constitution." Gn. 55, p. 317, note. R. Taylori, 

 Hort., is Z. Elliottiana X R. aurata. JARED G SMITH< 



L. H. B.| 



