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Project Name Data (Last Modified On 1/10/2013)
 

Flora Data (Last Modified On 1/10/2013)
Genus MONOCHAETUM Naud.
PlaceOfPublication Ann. Sci. Nat. Bot. III. 4:48. t. 2. 1845.
Description Flowers 4-merous. Hypanthium tubular to narrowly campanulate. Calyx divided nearly or quite to the torus; sepals lanceolate to ovate, commonly acumin- ate, persistent (in our species) or deciduous after anthesis. Petals medium-sized, usually obovate. Stamens 8 and dimorphic, or rarely only 4 by abortion; filaments slender, smooth; anthers slender, linear or subulate, those of the larger series arcuate, bearing at base a single elongate, erect or ascending, dorsal appendage, those of the smaller series straight, the appendage commonly proportionately longer. Ovary superior, 4-celled, pubescent to setose at the summit; stigma punctiform. Fruit a 4-valved capsule; seeds cochleate. Small shrubs with com- paratively small, linear to ovate, pli-nerved leaves and terminal cymes or cymules of pink, purple, or rarely white flowers.
Distribution About 35 species of the mountains from southern and western Mexico to Peru.
Key a. Pubescence of the upper part of the stem distinctly spreading; leaves ovate or ovate-lanceolate, commonly two-fifths to two-thirds as wide as long; bracteal leaves of the inflorescence scarcely smaller than the foliage leaves .......-.........................-. .............. 1. M . RIVULARE. aa. Pubescence of the upper part of the stem distinctly strigose, the hairs appressed or ascending at a narrow angle; leaves commonly a fourth to a third as wide as long. b. Flowers in a freely branched inflorescence; bracts ovate or oblong, much smaller than the leaves; large anthers 5-6 mm. long (excluding the spur). c. Leaves lanceolate, broadest well below the middle, firm, softly villous beneath .-.-. 2. M. CYMOSUM cc. Leaves broadest near the middle, thin, sparsely strigose on the lower side.. 3. M. BRACTEOLATUM bb. Flowers few in terminal cymules, the uppermost leaves scarcely reduced in size; large anthers 9-12 mm. long. --------------------------------- 4. M. MACRANTHERUM
 
 
 
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