724 =Teucrium nummularifolium= _Baker._ EIGAB—Hadendowa. Woolly herb with obovate coarsely crenate leaves about ⅓ in. long. Calyx woolly pilose, the lobes more or less subulate. Corolla purple. Red Sea Prov. (Erkowit). 725 =Ajuga bracteosa= _Wall._ Hairy perennial. Leaves oblanceolate, coarsely dentate, sessile. Whorls axillary 2- or many-flowered; calyx ⅙ in. long, 10-ribbed, teeth 5, equal; cor. blue, ⅓ in. long, upper lip short, lower longer, 3-lobed, deflexed; st. 4, slightly exserted. Upper White Nile Prov. (Meshra El Zeraf). =MONOCOTYLEDONS= =ALISMATACEÆ.= 726 =Alisma Plantago= _Linn._ Perennial marsh herb. Leaves radical, long petioled, lanceolate, ovate or cordate, 3-7 nerved, 2-8 in. long. Fl. in verticillate panicles; scapes solitary or many, 1-2 ft. high; fl. ab. 8 to each verticil. Sep. 3, persistent; pet. 3, white; sta. 6; carpels 15-20, compressed, forming a ring round the axis of the fl., verrucose; style aristate. Kordofan Prov. (Rahad). 727 =Caldenia reniformis= _Makino._ Marsh herb. Leaves broadly ovate, cordate, 1-4 in. long, 7-15 nerved, marked with pellucid lines; pet. up to 20 in. long. Scape 20-40 in. high, panicled above; fl. 3 in each verticil. Sep. broad ovate, after flowering erect and sheathing the fruit; pet. white; carpels 9-12 scarcely compressed, smooth; style aristate. Bahr El Ghazal Prov. (Jur: Jur Ghattas). 728 =Limnophyton obtusifolium= _Miq._ Perennial marsh herb. Leaves radical; pet. long; blade sagittate; sinus broad; terminal lobe 2-7 in. long, nerves 7-11, radiating from apex of pet. and somewhat converging. Scapes 1 or more; fl. in verticils arranged in a panicle, 4-15 to a whorl, upper male, the lower hermaphrodite mixed with a few male. Sep. 3, reflexed after flowering; pet. 3, white; sta. 6, those of the male fl. larger; carpels 15-20 in 2-4 whorls; achenes obovoid in a globose head. Blue Nile Prov. (Sennar); White Nile Prov. (Goz Abu Guma & J. Arashkol); Kordofan Prov. (Birkat Rahad); Darfur Prov. (Zalingei 3,100 ft.); Mongalla Prov. (Abu Kuka to Gondokoro). 729 =Lophotocarpus guyanensis= _Durand_ & _Schinz._ Marsh herb. Leaves with milky juice, radical, floating, ovate-cordate, 2 in. long; pet. varying in length with depth of water. Scape bearing few- flowered whorls near the apex, lower hermaphr., upper hermaphr. and male. Sep. 3, distinct, sheathing in fr.; pet. 3, cuneate, fugacious; sta. 6-10 in male fl., 9-12 in others, anthers elongate, sagittate; carpels numerous; achenes compressed laterally, dense on a convex receptacle. Kordofan Prov. (Taiara). 730 =Echinodorus humilis= _Buchen._ Small marsh herb with a tuft of brown roots. Leaves radical; pet. slender, usually 1-1½ in. long; blade ovate or ovate-lanc., ab. 1 in. long, acute at both ends. Scapes shorter than leaves, 1-flowered. Sep. 3, persistent; pet. 3, white; sta. 6-9; achenes much compressed, many in a subglobose or ovoid head.