i953] 



REVISION OF MACROLOBIUM 



301 



9-30 mm. apart; rachis 10-60 mm. long, slightly canaliculate or terete on the up- 

 per surface, not at all alate. Petiolules 2-6 mm. long. Leaflets 4-12 cm. long, 2- 

 6 cm. wide, the base inequilateral, acute to subcordate, the apex bluntly acute to 

 long-acuminate; costa impressed on the upper surface, salient beneath, the ven- 

 ules prominulous. Inflorescence 4-28 cm. long, rather densely flowered, the axis 

 pilose to puberulous, the peduncle 0-4 mm. long; bracts 5.5-12.5 mm. long, 1.5-4 

 mm. wide, lanceolate or elliptic, acuminate, pilose to puberulous; pedicels 2.5- 

 4.5 mm. long, pilose to puberulous; bracteoles 5.5-8.5 mm. long, 3—3-5 mm. wide, 

 oblong to elliptic, pilose to puberulous on the outer surface, pilosulose or glab- 

 rous within. Hypanthium 1-2 mm. long, glabrous to puberulous sparingly. Sepals 

 five, the adaxial pair more or less united, 1.5-4 mm. long, 0.5-1.5 mm. wide, ob- 

 long to lanceolate or infrequently triangular, the other sepals 2-5 mm. long, 1-2 

 mm. wide, oblong or linear to elliptic or lanceolate, acute to obtuse. Petal blade 

 3.5-5.5 mm. long, 5-8 mm. wide, the claw 4-7 mm. long, more or less auriculate, 

 glabrous or pilosulose externally, ciliolate basally, villosulose within, sometimes 

 sparsely so and rarely glabrous. Filaments 17-22.5 mm. long, villosulose in the 

 lower part. Stigma capitellate or capitate. Style 12.5-17 mm. long, glabrous or 

 rarely sparsely puberulous basally. Ovary 2-3.5 mm. long, 1-1.5 mm. wide, ob- 

 long, glabrous or sparsely and minutely puberulous on the margins, 2-4-ovulate; 

 gynophore 1.5-5 mm. long, subglabrous to pilosulose or puberulous, usually in- 

 serted near the apex of the adaxial hypanthial wall, but occasionally basal or 

 midway on the wall. Mature fruit unknown. 



Key to the Varieties of Macrolobium campestre 



1. Leaves always paripinnate, leaflets broadly ovate or elliptic, two-thirds or less as long 

 as wide; bracts densely pilose; shrub of campinas 21c. var. campestre. 



1. Leaves paripinnate or pseudo-imparipinnate, leaflets elliptic, lanceolate, or ovate, 



twice or more as long as wide; bracts pilosulose; tree of lowland forests 2. 



2. Inflorescence 16-28 cm. long; bracteoles glabrous or subglabrous on inner surface; 



leaves paripinnate 4. 



2. Inflorescence 4-12 cm. long; bracteoles strongly pubescent on inner surface; leaves 



pseudo-imparipinnate and paripinnate 3. 



3. Bracts 9 mm. long, lanceolate; leaflets mostly about 2-2.5 cm. wide; large tree (to 



35 m.) 21a. var. arboreum. 



3. Bracts 5.5-7 mm. long, elliptic or lanceolate-elliptic; leaflets mostly about 3.5-5 cm. 



wide; mediocre tree (to 20 m.) 21b. var. medium. 



4. Branchlets puberulous; leaflets 4-6.5 cm. long, oval to elliptic, abruptly acute; inflor- 



escence 25-28 cm. long, bracts 8 mm. long 2 Id. var. arirambense . 



4. Branchlets glabrous; leaflets 6-11.5 cm. long, ovate to lanceolate, acuminate; inflores- 

 cence 16-18.5 cm. long, bracts 10-12.5 mm. long 21e. var. longibracteatum. 



21a. Macrolobium campestre var. arboreum Cowan, var. nov. Figure 7. 



Arbor ad 35 m. alta, ramulis, petiolis, rachibus, petiolulisque glabris vel raro 

 pilosulis sed glabrescentibus. Petiolus 5-23 mm. longus, teres. Folia 2-3~jugata, 

 pari- vel pseudo-imparipinnata; rachibus (10-)20-45 mm. longa, leviter sulcatis. 

 Petiolulus 2-4 mm. longus. Foliola 40-80 mm. longa, 20-35 mm. lata, ovata, lan- 

 ceolata vel elliptica, ad basim plerumque obtusa, interdum acuta, ad apicem acu- 

 minata, raro acuta. Inflorescentiae 5.5-12 cm. longae,axe pilosulo; bracteis 9 mm. 

 longis, 3 mm. latis, lanceolatis, acuminatis, ambobus lateribus puberulis; bracte- 

 olis 6-7 mm. longis, 3.5 mm. latis, ellipticis, pilosulis. Hypanthium glabrum. Pe- 

 tali lamina 3.5-5 mm. longa, 6 mm. lata, transverse ovalis, unguicilo 4.5 mm. 

 longo. Ovarium glabrum, 2-ovulatum, gynophoro 3.5 mm. longo, puberulo. Fructus 

 immaturus 12-13 cm. longus, 4 cm. latus, oblongus, apicem versus latior, glaber, 

 carpophoro 6-13 mm. longo, puberulo. 



