• anthers of a flower all the same size
• filaments straight
• style straight (photo at right)
• filaments angle out at 45 degrees during hermaphroditic state (photo at right).
• fruit remains attached after it ripens

• undehisced anthers of a flower vary in size (photo at right)
• filaments curved to sigmoid
• style curved
• fruit remains attached after it ripens

• hirsute
• filaments usually do not angle out (photo at right), but when they do, never more than 15 degrees
• 5-lobed corolla
• fruits partially hidden in side view by the calyx which remains green (photo at left)
• fruits drop at maturity

• Flowering calyx only to 7.5 mm in diameter
  
• Calyx lobes recurved both lengthwise and in cross section (photo at left)
  
• Corolla 5-lobed (photo at right)
  
• Fruiting calyx recurved (photo at left) and lobe radius to 6 mm

• Mature plant glabrous except for lower half of filaments which are pubescent
  
• Stems having projecting acute-angled longitudinal ridges
  
• Corolla has 5 lobules in addition to 5 lobes
• Fruiting calyx an inverted funnel hiding the berry in side view (photo to left)

• densely velutinous
• peduncle shorter than 11 mm
• corolla 34 - 38 mm in diameter (hermaphroditic state)
• undehisced anthers longer than 2.8 mm
• stigma large (1.0 by 1.5 mm in overhead view).
• pollen diameter 42.5 - 46.25 µm is large
• fruit large

endemic to one area of Michoacan, Mexico

• peduncle long (type specimen)
• corolla maculae extend (on type specimen), most of the way out to tip of corolla lobe
• high altitude
• photos shown, left and right, are from high altitude plants collected in Guatemala
• field work is needed to determine if J. laxa is a distinct species or merely an ecotype of J. procumbens