Early- and late-harvest cordyceps are trade descriptions tied to development stage. Earlier material often has a fuller larval body and a shorter fungal structure; later material may show a longer structure and a more contracted body. Appraisal combines those proportions with species authentication, size distribution, dryness, breakage, repairs, debris, origin evidence and lot consistency.
Harvest stage changes visible proportions
Cordyceps forms when a fungal structure emerges from the head of an infected larva and extends above the soil. Material collected soon after emergence may retain a compact fungal head relative to a substantial body. As development continues, the structure can lengthen while the body loses fullness. Weather, elevation, specimen size and handling also affect appearance, so length alone cannot date a harvest precisely.
Compare body length, width and firmness with the fungal-structure length across a representative sample. A single short specimen on top of the box does not define the batch. Record an average and the range, noting unusually hollow, shrivelled or very long examples separately. Earlier-stage presentation can attract different demand, but it is a grading observation rather than evidence for any claimed personal effect.
Authentication must precede stage grading
The specimens should show coherent body rings, eight pairs of legs, a plausible head junction and a fungal structure that belongs to the same organism. Existing breaks may reveal an internal section, but intact pieces need not be snapped for inspection. Substituted species, moulded imitations or plant material can copy a colour and general silhouette while failing at leg arrangement and tissue transitions.
Inspect for toothpicks, wire, adhesive, added powder and joined breaks. Moisture can make a later specimen appear heavier and can blur a size comparison, so dry net weight and flexibility are recorded. Natural colour ranges across earth-yellow and brown; darkening may come from age, storage or deterioration. Origin labels such as Nagqu or Yushu need supporting records and lot-wide consistency beyond harvest-stage appearance.
Use a proportion record instead of a simple early-or-late badge
Lay selected large, average and small specimens beside a ruler and photograph the whole body and head junction. Note sample location within the box, body fullness, fungal length, complete-piece rate and defects. A report can then describe predominantly earlier, later or mixed presentation with an appropriate confidence level. This preserves the useful trade distinction while acknowledging biological variation and preventing one attractive specimen from defining the full lot.
Mixed harvest stages need a distribution, not a badge
A box may combine fuller early-looking specimens with later-looking pieces whose fungal structures are longer. Count each presentation in a representative sample and describe the proportions instead of applying the stronger term to the whole lot. If position within the box is known, record it; later material may have been placed below for appearance. A distribution also reveals whether grading variation is natural, the result of several purchases or evidence that separate lots were combined.
