1662 



IPOMCEA 



IRIARTEA 



It can easily be kept within bounds in the garden with 

 a little care, and makes a very desirable plant for cov- 

 ering an old dead stump or back fence. The chief 

 merit of 7. pandurata as a garden plant is its hardiness; 

 hence it is often sold as the "hardy" or "perennial 

 moonflower." If well mulched the roots will stand 26 

 below zero. There is a double-fld. form. It is some- 

 times escaped in cult, grounds. 



32. Jalapa, Lindl. (Batatas Jaldpa, Choisy). A 

 slender, glabrous, twining vine from a large woody root: 

 Ivs. triangular-ovate, entire or 3-lobed, plicate- veined : 

 peduncles usually very short, 1-fld.; sepals sub-equal, 

 broadly ovate, obtuse, J^in. long; fls. slender funnel- 

 form, 2-2^2 in. long, pink or purple. A Mexican 

 species, the roots of which possess purgative powers 

 equal to those of /. Purga. L.B.C. 6:518. The names 

 of this and 7. macrorhiza have been confused from 

 the fact that this plant, figured by Lindley in 1813 

 (B.M. 1572) as Convolvulus Jalapa (I. Jalapa, Pursh, 

 as synonym) is not the Carolinian plant described 

 by Pursh under that name in 1814. The plant 

 described by Pursh as 7. Jalapa is the 7. macrorhiza of 

 Michaux. 



33. Batatas, Poir. (Batatas edulis, Choisy). SWEET 

 POTATO. Lvs. ovate-cordate, usually angular or lobed, 

 variable, petioled: peduncles equaling or exceeding 

 the petioles, several-fld.; corolla 1-2 in. wide. Origin 

 probably from 7. fastigiata of Trop. Amer. (7. platani- 

 folia, R. & S.). Largely cult, in many varieties for its 

 edible tubers. See Sweet Potato. 



Several species of slight ornamental value occur in the southern 

 states, and are sometimes seen in cult. /. desertdrum, House. Re- 

 sembling I. hederacea but rough-pubescent and adapted to drier 

 situations. Ariz. /. lacundsa, Linn. Annual -with small white fls., 

 often with a pink limb. Pa. to S. C., 111. and Texas. /. polydnthes, 

 R. & S. (I. umbellata, Mey.). Small yellow fls. in umbels. Fla. and 

 Trop. Amer. I. trichocdrpa, Ell. S. C. to Fla., Kans. and Mex. 7. 

 triloba, Linn. Pink or purple corolla %iu. long.: Ivs. 3-lobed. Fla., 

 Ariz, and Trop. Amer. 



The two following species of recent intro. are as yet not common 

 in the trade: 7. Macalusoi, Mattei. Slightly pubescent, woody sts. : 

 Ivs. ovate-orbicular, abruptly acute and mucronate, deeply cordate; 

 petioles long, somewhat villous: fls. axillary, in subsessile cymes; 

 corolla large, campanulate, orange-colored, margined with red. 

 Native of Italian Somaliland. /. Mahonii, C. H. Wright. An erect 

 shrub with oblong Ivs. about 1 % in. long and 1 in. broad, obtuse at 

 both ends, entire: petioles %in. long: corolla-tube deep reddish 

 purple, paler above, the limb white or slightly suffused with pink, 

 over 3 in. broad. Native of Uganda. 



See Quamoclit for Ipomcea Quamodit, I. coccinea, I. vitifolia, and 

 7. hedersefolia. See Calonyction for 7. Bona-nox and 7. tastense. 

 Ipomcea Howardii, P. D. Barnhart, Pacific Garden 4 : No. 9, p. 5, Aug. 

 1911=Quamoclit grandiflora. 



EPOMdPSIS: Gilia. 



H. D. HouSE.f 



fPSEA (fancied resemblance to ips, a cynip insect 

 or a worm). Orchiddcese. Two or 3 terrestrial E. Indian 

 pseudobulbous orchids, allied to Pachystoma, with 

 which it has been united: Ivs. long, narrow and pli- 

 cate: scape sheathed; fls. few, large, highly colored. 

 I. speciosa, Lindl. (Pachystoma specidsum, Reichb.). 

 Deciduous, tuberous-rooted, with erect scapes to 18 in. 

 high: Ivs. 5-8, long-petioled, 6-10 in. long: fls. several, 

 bright yellow, fragrant, 2-3 in. diam., the lip oblong, 

 with side lobes triangular and middle lobe obovate: 

 pseudobulbs tufted. Ceylon. B.M. 5701. G. 26:189. 

 Blooms in winter. To be potted in fibrous loam, peat 

 and leaf-mold, and rested after growth. j^ jj. 3. 



IRESINE (Greek name for a harvest garland wound 

 with wool: the flowers and seeds of these plants are 

 woolly). Amarantacese. ACHYKANTHES. Ornamental- 

 leaved bedding plants. 



Low, spreading, climbing or erect herbs or subshrubs: 

 Ivs. stalked, opposite, the margins not toothed in the 

 domestic species: fls. very small, bracteate, in axillary 

 or terminal panicles, perfect or imperfect (plants some- 

 times dioecious), the perianth of one series terete, 5- 

 parted, with ovate-oblong segms.; stamens 5; style 

 short or none, the stigmas 2 or 3: fr. a utriculus. 



1964. Iresine Lindenii. ( x 1 A) 



Species 20-25 in Trop. and Subtrop. Amer. Two or 3 

 species are in common cult, as bedding-plants, because 

 of their highly colored Ivs. and sts. The first of these 

 to be intro. was described before the fls. were known 

 and it was referred to Achyranthes (A. Verschaffeltii), 



but in that genus 

 the anthers are 2- 

 loculed, whereas in 

 Iresine they are 1- 

 loculed. To gar- 

 deners they are still 

 known as Achy- 

 ranthes. 



Because of ease 

 of propagation, 

 ability to withstand 

 sun and shearing, 

 and the bright 

 colors, the iresines 

 are amongst the 

 most popular bed- 

 ding - plants. Few 

 plants are easier to 

 grow. Stock plants 

 are kept over win- 

 ter in a cool tem- 

 perature (as in a 

 carnation house), 

 and in February 

 and March they 

 are given more heat and moisture, and cut back, 

 to get cutting wood. Cuttings root quickly in any 

 good cutting-bed. For mass bedding, plants are usu- 

 ally set 6 to 10 inches apart. They will not withstand 

 frost. 



Herbstii, Hook. f. (Achyrdnthes Verschaffeltii, Lem.). 

 Lvs. broadly ovate or orbicular, obtuse and notched at 

 the apex, purple-red, with prominent arched veins, or 

 in the commoner variety green or green-red with yellow 

 veins (var. aureo-reticulata). S. Amer. B.M. 5499. 

 H.F. II. 7 : 103. This was described and figured in Aug., 

 1864, by Lemaire as Achyranthes (?) Verschaffeltii 

 (I. H. 11:409), and later by Van Houtte as Iresine 

 Verschaffeltii (F. S. 15:1601). In July, 1864, however, 

 Hooker had published it as Iresine Herbstii, in honor of 

 Mr. Herbst, of the Kew Nursery, who intro. it from the 

 River Platte. There are horticultural varieties with 

 Latin names. 7. Wdllisii, Ort., is a small form, with 

 numerous small roundish Ivs., which are bronze-red or 

 dark red above and dark blood-red beneath. 7. bril- 

 liantissima, has rich crimson color. 



Lindenii, Van Houtte (Achyrdnthes acumindta, and 

 7. acumindta, Hort.)- Fig. 1964. Lvs. ovate-acuminate 

 or lance-ovate, with less arching or curving veins, in 

 the original form rich, deep blood-red, but in some gar- 

 den forms with light-banded veins. Ecuador. F.S. 

 17:1737. G.Z. 13:32. More pyramidal in habit 

 than the other species, and now more common. To 

 this species evidently belong the garden forms known as 

 7. Emersonii, I. Collensii and 7. formosa, 



I. BiemueUeri, Voss (Achyranthes Biemuelleri, Haage & 

 Schmidt), is probably a garden form of one of the above. It is a 

 compact, dwarf grower, withstanding severe cutting: Ivs. and 

 twigs rose-carmine. L H B 



IRIARTEA (after Bernard Iriarte). Palmdcex. Tall 

 spineless palms, with cylindrical or swollen stems sup- 

 ported on a pyramid of exposed roots. 



Leaves few, unequally pinnate; Ifts. equilateral, 

 cuneate, entire or erose, plicate; petiole channelled; 

 sheath cylindrical: fls. small: fr. 1-2 in. long: stigmas 

 eccentric or lateral in fr. This palm is separated from 

 Ceroxylon by the cuneate Ifts. Species 10. Trop. S. 

 Amer. 7. Bungerothii was advertised in 1895 as Triar- 

 tea, which was presumably a typographical error for 

 Iriartea. This is a horticultural name for 7. exorrhiza, 



