Irwin & Barneby [Cassia gaudichaudii Hook. & Arnott; C. glanduli- gera St. John; Psilorhegma gaudichaudii (Hook. & Arnott) Degener; Senna glanduligera (St. John) A. C. Smith] (ind) Kolomona, heuhiuhi, kalamona, uhiuhi Shrubs 0.5-3(-4) m tall, young parts sparsely to densely yellowish pubescent (hairs spreading) or rarely glabrous. Leaflets (3)4-5(6) pairs, the distal ones larger, oblanceolate to elliptic, elliptic-oblanceo- late, occasionally oblong-elliptic or oblong- lanceolate, 2-7(-10.5) cm long, (0.6-) 1—1.8(-3.3) cm wide, upper surface green, glabrous to pubescent along midrib, lower surface glaucous and evenly pubescent, pubescent only along midrib, or glabrous, margins ± ciliate, apex rounded, emargi- nate, base obliquely rounded, clavate nectaries 1-3 mm long present between the first and usually second pairs of leaflets, stipules linear-subulate, 6-18 mm long, deciduous or occasionally shortly persistent. Flowers in racemes 2-10 cm long, pedicels 11-24 mm long, bracts narrowly ovate to lanceolate, 3-7 mm long, persistent; calyx lobes elliptic-ovate, outer ones 3-4 mm long, inner ones 5-9 mm long; petals greenish white to chartreuse or pale yellow, occasionally tinged red, narrowly to broadly obovate or ovate, 9-17 mm long; fertile stamens 10, all nearly similar to one another, slightly increasing in size toward abaxial side of flower; filaments 9, 1.3-1.5 mm long, the central abaxial one 1.8-2 mm long. Pods pendulous, chartaceous, strongly compressed, 6-13 cm long, 1.2-1.5 cm wide, base constricted to a stipe 0.6-1.2 cm long, indehiscent or tardily so, the cavity with narrow interseminal septa. Seeds oriented transversely in 1 row, compressed parallel to the valves, dark reddish brown, glossy to only slightly so, compressed-ellipsoid, oblong-ellipsoid to suborbicular, 6-8 mm long, the pleurogram inconspicuous, ca. 4-5 mm long. [2n = 28*.] Occurring in the Pacific Basin, including the New Hebrides, Austral Islands, Rapa, Henderson Island, Fiji, Hawaii, and perhaps New Caledonia and Tahiti; in Hawaii primarily occurring in leeward sites usually on talus slopes, lava flows, or rocky sites in coastal Leucaena-Prosopis shrubland, disturbed hala forest, dry forest, and occasionally lower portions of mesic forest, 5-920 m, documented from all of the main islands except Ni‘ihau and Kaho‘olawe.—Plate 94. Senna gaudichaudii is extremely closely related to and probably conspecific with S. glanduligera. St. John (in St. John & Phil- ipson, 1962) and more recently A. Smith (1985) consider the indigenous Senna on the New Hebrides, Austral Islands, Rapa, Hen-derson Island, Fiji, and perhaps New Caledonia and Tahiti to be S. glanduligera. Smith reports the separation as being based on the following characters in S. glanduligera: young parts and lower surface of leaflets sparsely pubescent and glabrate at anthesis, stipules 5-12 mm long, leaflets (3)4(5) pairs, interpetiolar nectaries present between 2-3 lowermost leaflets, and leaflets elliptic to oblong, the largest ones (3.4-)4- 7(-8) cm long, 1.3-3.7 cm wide. St. John reports S. glanduligera as having interpetiolar nectaries 1.5-2 mm long, bracts 2-3 mm long, ovate to elliptic, outer calyx lobes 4-5.5 mm long, inner ones 5-6 mm long, petals 6 mm long, pods 10-13.5 cm long, and seeds dull dark brown. Careful study of the numerous BISH specimens of Hawaiian Senna gaudichaudii, summarized in the above description, showed that most of the distinguishing features reportedly found outside Hawaii indeed occur in Hawaiian populations. Moreover, the small petal size indicated by St. John was based on Henderson Island plants; Fiji populations have petals up to 13 mm long (A. Smith, 1985), well within the range of Hawaiian populations. Thus it would seem that there is but one Senna indigenous to Pacific islands, S. gaudichaudii; however, a detailed study of the overall patterns is needed.